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Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs Dap® Dynaflex® 800 Advanced

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

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HP4 | Hybrid Polymer Exterior Sealant

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Dap® Dynaflex® 800 Advanced

Compared with

Dap® Dynaflex® 800 Advanced

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

Dap® Dynaflex® 800 Advanced

Advanced Hybrid Polymer
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

Dap® Dynaflex® 800 Advanced

ASTM C920 – Class 25 (±25% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes; Tack-Free approximately 30 minutes

Dap® Dynaflex® 800 Advanced

Tooling time approximately 30 minutes; Tack-Free approximately 2 hours
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0°F to 120°F

Dap® Dynaflex® 800 Advanced

0°F to 120°F
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

Dap® Dynaflex® 800 Advanced

Standard 4” nozzle configuration

Comparative Overview

Both HP4 and DAP® DYNAFLEX® 800 utilize advanced hybrid polymer technology and meet ASTM C920 Class 25 movement requirements for exterior siding and window applications.

Attribute HP4 | Hybrid Polymer Exterior Sealant Dap® Dynaflex® 800 Advanced
Hybrid Polymer Technology
✓
✓
ASTM C920 Class 25
✓
✓
Faster Tack-Free Performance
✓
✕
Application Temperature 0°F–120°F
✓
✓
Application – Nozzle Options
✓
✕
Direct-to-Contractor Platform
✓
✕
Color Matching Capability
✓
✓

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✓

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✓

Faster Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✕

Application Temperature 0°F–120°F

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✓

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✕

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 800 Advanced

✓

Differences You’ll Notice

Key differences between HP4 and DAP® DYNAFLEX® 800 include tack-free time, nozzle configuration, and supply structure. HP4 reaches tack-free in approximately 30 minutes and is available through a direct-to-contractor online platform with case-based pricing and jobsite delivery.

Ready to Make the Switch?

Advanced hybrid technology. Easy on-line ordering platform. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs Dap® Dynaflex® 920

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

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HP4 | Hybrid Polymer Exterior Sealant

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Dap® Dynaflex® 920

Compared with

Dap® Dynaflex® 920

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

Dap® Dynaflex® 920

Synthetic Rubber Elastomeric Technology
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

Dap® Dynaflex® 920

ASTM C920 – Class 25 (±25% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes / Tack-Free approximately 30 minutes

Dap® Dynaflex® 920

Tooling time approximately 5 minutes / Tack-Free approximately 10 minutes
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0°F to 120°F

Dap® Dynaflex® 920

0°F to 120°F
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

Dap® Dynaflex® 920

Standard 4” nozzle configuration

Comparative Overview

Both HP4 and DAP® DYNAFLEX® 920 are designed for exterior siding, trim, and window applications.

Attribute HP4 | Hybrid Polymer Exterior Sealant Dap® Dynaflex® 920
Hybrid Polymer Technology
✓
✕
ASTM C920 Class 25
✓
✓
Application Temperature Range
✓
✓
Application – Nozzle Options
✓
✕
Low-Odor Formulation
✓
✕
Color Matching Capability
✓
✓
Direct-to-Contractor Platform
✓
✕

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✕

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✓

Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✓

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✕

Low-Odor Formulation

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✓

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

Dap® Dynaflex® 920

✕

Differences You’ll Notice

Key differences between HP4 and DAP® DYNAFLEX® 920 include sealant chemistry (hybrid vs solvent-based), tack-free timing, odor profile, nozzle configuration, and supply structure.

Ready to Make the Switch?

Advanced hybrid technology. 0°F to 120°F application range. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs OSI® Quad®

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

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HP4 | Hybrid Polymer Exterior Sealant

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OSI® Quad®

Compared with

OSI® Quad®

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

OSI® Quad®

Elastomeric polymers with synthetic resins
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

OSI® Quad®

ASTM C920 – Class 25 (±25% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes / Tack-Free approximately 30 minutes

OSI® Quad®

4-6 minutes at 72° and 70% relative humidity / 10 hours at 72° and 70% relative humidity
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0° F to 120° F

OSI® Quad®

20° F to 100° F
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

OSI® Quad®

Standard 4” nozzle configuration

Comparative Overview

Both HP4 and OSI® QUAD® are designed for exterior siding, trim, and window applications.

Attribute HP4 | Hybrid Polymer Exterior Sealant OSI® Quad®
Hybrid Polymer Technology
✓
✕
ASTM C920 Class 25
✓
✓
Application Temperature Range
✓
✕
Application – Nozzle Options
✓
✕
Color Matching Capability
✓
✓
Direct-to-Contractor Platform
✓
✕

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✕

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✓

Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✕

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✓

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad®

✕

Differences You’ll Notice

Key differences between HP4 and OSI® QUAD® include sealant chemistry (hybrid vs solvent-based), tack-free time, temperature workability, nozzle configuration, and supply structure.

Ready to Make the Switch?

Advanced hybrid technology. 0°F to 120°F application range. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs OSI® Quad Max®

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

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HP4 | Hybrid Polymer Exterior Sealant

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OSI® Quad Max®

Compared with

OSI® Quad Max®

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

OSI® Quad Max®

Silane-Modified Polymer (Hybrid Technology)
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

OSI® Quad Max®

ASTM C920 – Class 50 (±50% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes; Tack-Free approximately 30 minutes

OSI® Quad Max®

Skin approximately 17–20 minutes; Tack-Free approximately 15 hours
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

OSI® Quad Max®

Standard nozzle configuration

Comparative Overview

Both HP4 and OSI® QUAD® Max utilize advanced hybrid (MS Polymer) technology for exterior siding and window applications.

Attribute HP4 | Hybrid Polymer Exterior Sealant OSI® Quad Max®
Hybrid Polymer Sealant
✓
✓
ASTM C920 Class 25
✓
✕
ASTM C920 Class 50
✕
✓
Application – Nozzle Options
✓
✕
10.1 fl oz Across All Colors
✓
✕
Clear SKU Clarity
✓
✕
Color Matching Capability
✓
✓
Direct-to-Contractor Platform
✓
✕

Hybrid Polymer Sealant

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✓

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✕

ASTM C920 Class 50

HP4 | Hybrid Polymer Exterior Sealant

✕

OSI® Quad Max®

✓

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✕

10.1 fl oz Across All Colors

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✕

Clear SKU Clarity

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✓

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

OSI® Quad Max®

✕

Differences You’ll Notice

HP4 currently meets ASTM C920 Class 25 movement requirements, while OSI® QUAD® Max meets Class 50 movement requirements. Key differences HP4 and Quad® Max include tack-free time, cartridge fill volume, clear SKU appearance, and supply structure. HP4 provides a full 10.1 fl oz cartridge across all colors and includes application-specific nozzle options designed to support both siding and window installations. HP4 is available through a direct-to-contractor online platform with case-based pricing and delivery to the jobsite or office.

Ready to Make the Switch?

Advanced hybrid technology. 10.1 fl oz across all colors. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs Solar Seal® #900 Solar Seal®

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

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HP4 | Hybrid Polymer Exterior Sealant

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αβγ εικόνα

Compared with

Solar Seal® #900 Solar Seal®

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

Solar Seal® #900 Solar Seal®

Terpolymer Elastomeric Technology
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

Solar Seal® #900 Solar Seal®

ASTM C920 – Class 25 (±25% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes; Tack-Free approximately 30 minutes

Solar Seal® #900 Solar Seal®

Thin skin in 24 hours, Complete cure approximately 21 days @ 75°F; Tack-Free 4 hours
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0°F to 120°F

Solar Seal® #900 Solar Seal®

10°F to 125°F
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

Solar Seal® #900 Solar Seal®

Standard nozzle configuration

Comparative Overview

Both HP4 and #900 Solar Seal® meet ASTM C920 Class 25 movement requirements for exterior siding and window applications.

Attribute HP4 | Hybrid Polymer Exterior Sealant Solar Seal® #900 Solar Seal®
Hybrid Polymer Technology
✓
✕
ASTM C920 Class 25
✓
✓
Faster Skin / Cure Profile
✓
✕
Application Temperature Range
✓
✕
No Overnight Tube Warming Required
✓
✕
Application – Nozzle Options
✓
✕
Direct-to-Contractor Platform
✓
✕
Color Matching Capability
✓
✓

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✓

Faster Skin / Cure Profile

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

No Overnight Tube Warming Required

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

Solar Seal® #900 Solar Seal®

✓

Differences You’ll Notice

Key differences between HP4 and #900 Solar Seal® include sealant chemistry, skin and cure timing, application temperature range, cold-weather handling requirements, nozzle configuration, and supply structure. HP4 skins in 15–20 minutes and reaches tack-free in approximately 30 minutes, supporting faster progression on the jobsite. HP4 can be applied from 0°F to 120°F and does not require overnight tube warming in cool conditions, reducing preparation time before installation. HP4 is available through a direct-to-contractor online platform with case-based pricing and delivery to the jobsite or office.

Ready to Make the Switch?

Advanced hybrid technology. Apply from 0° F – no overnight warming required. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs Geocel® 2300 Construction Tripolymer Sealant

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

Origin Pro

HP4 | Hybrid Polymer Exterior Sealant

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αβγ εικόνα

Compared with

Geocel® 2300 Construction Tripolymer Sealant

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

Geocel® 2300 Construction Tripolymer Sealant

Construction Tripolymer (Solvent Technology)
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement), AAMA 800 & ASTM C1382 (EFIS)

Geocel® 2300 Construction Tripolymer Sealant

Performance data reported under ASTM D412, C719, C793, and C794 test methods (see manufacturer TDS)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes; Tack-Free approximately 30 minutes

Geocel® 2300 Construction Tripolymer Sealant

Tack-Free approximately 120 minutes; Cure approximately 5 days
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0°F to 120°F

Geocel® 2300 Construction Tripolymer Sealant

0°F to 140°F (manufacturer recommends warming below 40°F)
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

Geocel® 2300 Construction Tripolymer Sealant

Standard 4” nozzle configuration

Comparative Overview

HP4 is classified under ASTM C920 Class 25 movement requirements. Geocel® 2300 publishes performance data under individual ASTM test methods.

Attribute HP4 | Hybrid Polymer Exterior Sealant Geocel® 2300 Construction Tripolymer Sealant
Hybrid Polymer Technology
✓
✕
ASTM C920 Classification
✓
✕
Published ASTM Test Methods
✓
✓
Faster Tack-Free Performance
✓
✕
Faster Cure Profile
✓
✕
No Cold-Weather Tube Warming Recommended
✓
✕
Application – Nozzle Options
✓
✕
Direct-to-Contractor Platform
✓
✕
Color Matching Capability
✓
✓

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

ASTM C920 Classification

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

Published ASTM Test Methods

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✓

Faster Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

Faster Cure Profile

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

No Cold-Weather Tube Warming Recommended

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

Application – Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✕

Color Matching Capability

HP4 | Hybrid Polymer Exterior Sealant

✓

Geocel® 2300 Construction Tripolymer Sealant

✓

Differences You’ll Notice

Key differences between HP4 and Geocel® 2300 include sealant chemistry (hybrid vs tripolymer), skin and cure timing, cold-weather handling requirements, nozzle configuration, and supply structure. Geocel® 2300 colors may not be sold in California. HP4 skins faster, reaches tack-free more quickly, and can be applied from 0°F without manufacturer-recommended tube warming. HP4 is available through a direct-to-contractor online platform with case-based pricing and delivery to the jobsite or office.

Ready to Make the Switch?

Advanced hybrid technology. Apply from 0°F—no warming required. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP4 | Hybrid Polymer Exterior Sealant vs Sika® Sikaflex® NP 1

Review side-by-side product details, technical notes, and practical differences.

HP4 | Hybrid Polymer Exterior Sealant

Origin Pro

HP4 | Hybrid Polymer Exterior Sealant

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Sika® Sikaflex® NP 1

Compared with

Sika® Sikaflex® NP 1

Core Performance & Application Attributes

Sealant Technology

HP4 | Hybrid Polymer Exterior Sealant

Advanced Hybrid Polymer (SMP / MS Polymer)

Sika® Sikaflex® NP 1

Moisture-Curing Polyurethane (Urethane)
Product Class & Movement (ASTM C920)

HP4 | Hybrid Polymer Exterior Sealant

ASTM C920 – Class 25 (±25% joint movement)

Sika® Sikaflex® NP 1

ASTM C920 – Class 35 (±35% joint movement)
Skin Formation / Tack-Free Performance

HP4 | Hybrid Polymer Exterior Sealant

Skin 15–20 minutes / Tack-Free approximately 30 minutes

Sika® Sikaflex® NP 1

Skins overnight (within 24 hours); Full cure approximately 1 week
Application Temperature Range

HP4 | Hybrid Polymer Exterior Sealant

0° F to 120° F

Sika® Sikaflex® NP 1

Application generally recommended at 40° F and above (per TDS guidance)
Nozzle Options

HP4 | Hybrid Polymer Exterior Sealant

V-notch option for 3/8" siding joint coverage plus standard 4" nozzle for 1/4" window bead applications

Sika® Sikaflex® NP 1

Standard nozzle configuration

Comparative Overview

Both HP4 and Sikaflex® NP 1 are designed for exterior sealing applications and meet ASTM C920 requirements.

Attribute HP4 | Hybrid Polymer Exterior Sealant Sika® Sikaflex® NP 1
Hybrid Polymer Technology
✓
✕
Polyurethane (Urethane) Technology
✕
✓
ASTM C920 Class 25
✓
✕
ASTM C920 Class 35
✕
✓
Faster Skin / Cure Profile
✓
✕
Application Temperature Down to 0°F
✓
✕
Intended Use – Siding & Window
✓
✕
Intended Use – Roofing / Commercial
✕
✓
Direct-to-Contractor Platform
✓
✕

Hybrid Polymer Technology

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

Polyurethane (Urethane) Technology

HP4 | Hybrid Polymer Exterior Sealant

✕

Sika® Sikaflex® NP 1

✓

ASTM C920 Class 25

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

ASTM C920 Class 35

HP4 | Hybrid Polymer Exterior Sealant

✕

Sika® Sikaflex® NP 1

✓

Faster Skin / Cure Profile

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

Application Temperature Down to 0°F

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

Intended Use – Siding & Window

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

Intended Use – Roofing / Commercial

HP4 | Hybrid Polymer Exterior Sealant

✕

Sika® Sikaflex® NP 1

✓

Direct-to-Contractor Platform

HP4 | Hybrid Polymer Exterior Sealant

✓

Sika® Sikaflex® NP 1

✕

Differences You’ll Notice

Sikaflex® NP 1 is a polyurethane sealant frequently specified for commercial roofing, façade systems, and higher-movement joints. HP4 is positioned for siding, window, and trim installations requiring efficient application, faster tack-free timing, and broader temperature flexibility. Contractors selecting between the two should consider project type: commercial façade and roofing applications versus residential siding and window installations.

Ready to Make the Switch?

Advanced hybrid technology. Built for siding and window installs. Delivered direct.

View HP4 | Hybrid Polymer Exterior Sealant Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs GE® Advanced Silicone 2 Window & Door Sealant

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Origin Pro

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

View Product
αβγ εικόνα

Compared with

GE® Advanced Silicone 2 Window & Door Sealant

Core Performance & Application Attributes

Sealant Technology

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

100% Acetoxy-Cure Silicone

GE® Advanced Silicone 2 Window & Door Sealant

Neutral-Cure Silicone Sealant
Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Meets the intent of ASTM C920 for non-porous exterior glazing applications

GE® Advanced Silicone 2 Window & Door Sealant

ASTM C920 – Class 35 (±35% joint movement)
Skin Formation / Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Skin 10–15 minutes / Tack-Free approximately 20–30 minutes

GE® Advanced Silicone 2 Window & Door Sealant

Work life approximately 5–10 minutes / Tack-Free approximately 30 minutes
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior glazing and exposed joint sealing

GE® Advanced Silicone 2 Window & Door Sealant

Window and door weatherproofing applications
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Online ordering. Case-based contractor pricing. Delivered direct to jobsite or office.

GE® Advanced Silicone 2 Window & Door Sealant

Retail and building material supply distribution.

Comparative Overview

Both HP3 and GE Advanced Silicone 2 are silicone sealants designed for exterior sealing applications around windows, doors, and other non-porous construction substrates.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) GE® Advanced Silicone 2 Window & Door Sealant
100% Silicone Sealant
✓
✓
Acetoxy-Cure Silicone
✓
✕
Neutral-Cure Silicone
✕
✓
ASTM C920 Class 35
✕
✓
Primary Application Focus – Exterior Glazing
✓
✕
Fast Skin Formation
✓
✕
Rain-Ready Performance
✓
✓
Direct-to-Contractor Platform
✓
✕

100% Silicone Sealant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✓

Acetoxy-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✕

Neutral-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✕

GE® Advanced Silicone 2 Window & Door Sealant

✓

ASTM C920 Class 35

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✕

GE® Advanced Silicone 2 Window & Door Sealant

✓

Primary Application Focus – Exterior Glazing

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✕

Fast Skin Formation

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✕

Rain-Ready Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✓

Direct-to-Contractor Platform

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® Advanced Silicone 2 Window & Door Sealant

✕

Differences You’ll Notice

Key differences between HP3 and GE Advanced Silicone 2 include silicone cure chemistry (acetoxy vs neutral cure), movement classification, skin timing, and supply structure. HP3 is optimized for exterior glazing and exposed joint sealing, while GE Advanced Silicone 2 is commonly used for window and door weatherproofing applications.

Ready to Make the Switch?

Professional-grade 100% silicone. Exterior glazing performance. Delivered direct.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs NovaFlex® Multi-Purpose Adhesive Sealant

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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Compared with

NovaFlex® Multi-Purpose Adhesive Sealant

Core Performance & Application Attributes

Sealant Technology

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

100% Acetoxy-Cure Silicone

NovaFlex® Multi-Purpose Adhesive Sealant

Neutral-Cure Silicone Adhesive Sealant
Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Meets the intent of ASTM C920 for non-porous exterior glazing applications

NovaFlex® Multi-Purpose Adhesive Sealant

ASTM C920 – Class 35 / Class 50 (depending on formulation)
Skin Formation / Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Skin 10–15 minutes / Tack-Free approximately 20–30 minutes

NovaFlex® Multi-Purpose Adhesive Sealant

Skin approximately 5–10 minutes / Through cure approximately 48 hours
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior glazing and exposed joint sealing

NovaFlex® Multi-Purpose Adhesive Sealant

Silicone adhesive sealant for window and door assembly applications
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Online ordering. Case-based contractor pricing. Delivered direct to jobsite or office.

NovaFlex® Multi-Purpose Adhesive Sealant

Commercial and industrial distribution channels.

Comparative Overview

Both HP3 and NovaFlex® are silicone sealants designed for exterior sealing applications.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) NovaFlex® Multi-Purpose Adhesive Sealant
100% Silicone Sealant
✓
✓
Acetoxy-Cure Silicone
✓
✕
Neutral-Cure Silicone
✕
✓
Faster Tack-Free Performance
✓
✕
Primary Application Focus – Exterior Glazing
✓
✕
Direct-to-Contractor Platform
✓
✕

100% Silicone Sealant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

NovaFlex® Multi-Purpose Adhesive Sealant

✓

Acetoxy-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

NovaFlex® Multi-Purpose Adhesive Sealant

✕

Neutral-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✕

NovaFlex® Multi-Purpose Adhesive Sealant

✓

Faster Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

NovaFlex® Multi-Purpose Adhesive Sealant

✕

Primary Application Focus – Exterior Glazing

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

NovaFlex® Multi-Purpose Adhesive Sealant

✕

Direct-to-Contractor Platform

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

NovaFlex® Multi-Purpose Adhesive Sealant

✕

Differences You’ll Notice

Key differences between HP3 and NovaFlex® include silicone cure chemistry (acetoxy vs neutral cure), movement classification, skin and cure timing, and supply structure. HP3 is formulated for exterior glazing and exposed joint sealing, where fast skin formation and durable weather resistance are required. NovaFlex® is commonly used as a silicone adhesive sealant for window and door assembly applications.

Ready to Make the Switch?

Professional-grade 100% silicone. Exterior glazing performance. Delivered direct.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs Dap® 100% Silicone Rubber Window, Door & Siding

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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Compared with

Dap® 100% Silicone Rubber Window, Door & Siding

Core Performance & Application Attributes

Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

ASTM C920 Class 25; ±25% movement capability

Dap® 100% Silicone Rubber Window, Door & Siding

ASTM C920 Class 25; ±25% movement capability
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Professional contractor-oriented supply with direct ordering

Dap® 100% Silicone Rubber Window, Door & Siding

Widely available retail format
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior sealing applications including windows, doors, siding, and general construction joints

Dap® 100% Silicone Rubber Window, Door & Siding

Exterior sealing applications including windows, doors, siding, and general construction joints

Comparative Overview

Both products meet ASTM C920 Class 25 performance requirements and are suitable for exterior sealing applications.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Dap® 100% Silicone Rubber Window, Door & Siding
Neutral Cure Silicone
✓
Yes
✕
No
ASTM C920 Class 25
✓
Yes
✓
Yes
±25% Movement Capability
✓
Yes
✓
Yes
Low Odor Application
✓
Yes
✕
No
Smooth, Controlled Bead
✓
Yes
–
Moderate
No Tooling Required
✓
Yes
✕
No
Broad Substrate Compatibility
✓
Yes
–
Limited
Mold & Mildew Resistant
✓
Yes
✓
Yes
Exterior Weather Resistance
✓
Yes
✓
Yes
Professional-Grade Performance
✓
Yes
–
General Purpose

Neutral Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✕
No

ASTM C920 Class 25

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✓
Yes

±25% Movement Capability

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✓
Yes

Low Odor Application

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✕
No

Smooth, Controlled Bead

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

–
Moderate

No Tooling Required

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✕
No

Broad Substrate Compatibility

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

–
Limited

Mold & Mildew Resistant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✓
Yes

Exterior Weather Resistance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

✓
Yes

Professional-Grade Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓
Yes

Dap® 100% Silicone Rubber Window, Door & Siding

–
General Purpose

Differences You’ll Notice

Legacy Pro™ HP3 is engineered for professional contractor use, offering improved workability, cleaner application, and greater substrate compatibility. DAP® 100% Silicone provides dependable performance in a widely available retail format, with limitations typical of acetoxy cure silicones.

Ready to Make the Switch?

Legacy Pro™ HP3 is engineered for professional contractor use, offering improved workability, cleaner application, and greater substrate compatibility.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs GE® 2000

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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Compared with

GE® 2000

Core Performance & Application Attributes

Sealant Technology

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

100% Acetoxy-Cure Silicone

GE® 2000

One-Part Acetoxy-Cure Silicone Sealant
Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Meets the intent of ASTM C920 for non-porous exterior glazing applications

GE® 2000

General purpose glazing silicone (ASTM C920 classification not listed in TDS)
Skin Formation / Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Skin 10–15 minutes / Tack-Free approximately 20–30 minutes

GE® 2000

Tack-Free approximately 10 minutes / Cure approximately 2 days (50% RH)
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior glazing, glass-to-metal joints, and other smooth, non-porous construction substrates

GE® 2000

Exterior glazing, glass-to-metal joints, and other smooth, non-porous construction substrates
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Online ordering. Case-based contractor pricing. Delivered direct to jobsite or office.

GE® 2000

Commercial and glazing supply distribution.

Comparative Overview

Both HP3 and GE 2000 are acetoxy-cure silicone sealants designed for exterior glazing and sealing of glass, metal, and other non-porous substrates.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) GE® 2000
100% Silicone Sealant
✓
✓
Acetoxy-Cure Silicone
✓
✓
Faster Skin Formation
✓
✕
Primary Application Focus – Exterior Glazing
✓
✓
Direct-to-Contractor Platform
✓
✕

100% Silicone Sealant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® 2000

✓

Acetoxy-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® 2000

✓

Faster Skin Formation

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® 2000

✕

Primary Application Focus – Exterior Glazing

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® 2000

✓

Direct-to-Contractor Platform

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

GE® 2000

✕

Differences You’ll Notice

Key differences between HP3 and GE 2000 include skin formation timing and supply structure. HP3 skins within approximately 10–15 minutes and is available through a direct-to-contractor online platform with case-based pricing and jobsite delivery.

Ready to Make the Switch?

Professional-grade 100% silicone. Exterior glazing performance. Delivered direct.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs DOWSIL™ 999 Silicone Glazing Sealant

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

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Compared with

DOWSIL™ 999 Silicone Glazing Sealant

Core Performance & Application Attributes

Sealant Technology

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

100% Acetoxy-Cure Silicone

DOWSIL™ 999 Silicone Glazing Sealant

Acetoxy-Cure Silicone Sealant
Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Meets the intent of ASTM C920 for non-porous exterior glazing applications

DOWSIL™ 999 Silicone Glazing Sealant

ASTM C920 – Class 25 (±25% joint movement)
Skin Formation / Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Skin 10–15 minutes / Tack-Free approximately 20–30 minutes

DOWSIL™ 999 Silicone Glazing Sealant

Typical glazing silicone skin formation; cure based on atmospheric moisture (see TDS)
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior glazing and exposed joint sealing

DOWSIL™ 999 Silicone Glazing Sealant

Exterior glazing and sealing of glass and other non-porous substrates
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Online ordering. Case-based contractor pricing. Delivered direct to jobsite or office.

DOWSIL™ 999 Silicone Glazing Sealant

Commercial glazing and building supply distribution

Comparative Overview

Both HP3 and DOWSIL™ 999 are acetoxy-cure silicone sealants designed for exterior glazing and sealing of glass and other non-porous substrates.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) DOWSIL™ 999 Silicone Glazing Sealant
100% Silicone Sealant
✓
✓
Acetoxy-Cure Silicone
✓
✓
ASTM C920 Class 25
✓
✓
Faster Skin Formation
✓
✕
Direct-to-Contractor Platform
✓
✕

100% Silicone Sealant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 999 Silicone Glazing Sealant

✓

Acetoxy-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 999 Silicone Glazing Sealant

✓

ASTM C920 Class 25

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 999 Silicone Glazing Sealant

✓

Faster Skin Formation

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 999 Silicone Glazing Sealant

✕

Direct-to-Contractor Platform

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 999 Silicone Glazing Sealant

✕

Differences You’ll Notice

Key differences between HP3 and DOWSIL™ 999 include skin formation timing and supply structure. HP3 is designed for exterior glazing applications with fast skin formation and is available through a direct-to-contractor online platform with case-based pricing and jobsite delivery.

Ready to Make the Switch?

Professional-grade 100% silicone. Exterior glazing performance. Delivered direct.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

Product Comparison

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) vs DOWSIL™ 795 Silicone Building Sealant

Review side-by-side product details, technical notes, and practical differences.

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Origin Pro

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

View Product
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Compared with

DOWSIL™ 795 Silicone Building Sealant

Core Performance & Application Attributes

Sealant Technology

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

100% Acetoxy-Cure Silicone

DOWSIL™ 795 Silicone Building Sealant

Neutral-Cure Structural Silicone Sealant
Product Class & Movement (ASTM C920)

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Meets the intent of ASTM C920 for non-porous exterior glazing applications

DOWSIL™ 795 Silicone Building Sealant

ASTM C920 – Class 50 (±50% joint movement)
Skin Formation / Tack-Free Performance

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Skin 10–15 minutes / Tack-Free approximately 20–30 minutes

DOWSIL™ 795 Silicone Building Sealant

Tooling time approximately 20–30 minutes / Tack-Free approximately 90–180 minutes
Primary Application Focus

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Exterior glazing and exposed joint sealing

DOWSIL™ 795 Silicone Building Sealant

Structural glazing and commercial façade applications
Distribution

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

Online ordering. Case-based contractor pricing. Delivered direct to jobsite or office.

DOWSIL™ 795 Silicone Building Sealant

Commercial glazing and specialty construction supply distribution

Comparative Overview

Both HP3 and DOWSIL™ 795 are silicone sealants used in exterior glazing and sealing applications.

Attribute HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) DOWSIL™ 795 Silicone Building Sealant
100% Silicone Sealant
✓
✓
Acetoxy-Cure Silicone
✓
✕
Neutral-Cure Silicone
✕
✓
ASTM C920 Class 50
✕
✓
Faster Skin Formation
✓
✕
Direct-to-Contractor Platform
✓
✕

100% Silicone Sealant

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 795 Silicone Building Sealant

✓

Acetoxy-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 795 Silicone Building Sealant

✕

Neutral-Cure Silicone

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✕

DOWSIL™ 795 Silicone Building Sealant

✓

ASTM C920 Class 50

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✕

DOWSIL™ 795 Silicone Building Sealant

✓

Faster Skin Formation

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 795 Silicone Building Sealant

✕

Direct-to-Contractor Platform

HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure)

✓

DOWSIL™ 795 Silicone Building Sealant

✕

Differences You’ll Notice

Key differences between HP3 and DOWSIL™ 795 include silicone cure chemistry (acetoxy vs neutral cure), movement classification, skin formation timing, and supply structure.

Ready to Make the Switch?

Professional-grade 100% silicone. Exterior glazing performance. Delivered direct.

View HP3 | 100% Silicone Exterior Sealant (Acetoxy Cure) Details

The product comparison data provided is based on technical specifications published by the original manufacturers at the time of review. All references are for functional and category comparison only and do not imply product equivalence, approval, certification, or endorsement. Users should consult technical documentation and conduct their own performance evaluation to determine fitness for use in specific applications. Legacy Sealants, Inc. assumes no liability for third-party performance claims or changes in manufacturer formulations.

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