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ORIGIN PRO COMPARE
Origin Pro HP3 vs. DOWSIL™ 795 Silicone Building Sealant
Compared with
DOWSIL™ 795 Silicone Building Sealant
Technical Overview
Origin Pro HP3: Neutral-cure alkoxy RTV silicone; ASTM C920 Class 50; ±50% movement.
DOWSIL™ 795: One-part neutral-cure RTV silicone; ASTM C920 Type S, Grade NS, Class 50; ±50% movement.
Comparison Table
| Attribute | Origin Pro HP3 | DOWSIL™ 795 Silicone Building Sealant |
|---|---|---|
| Sealant Technology | Neutral-cure alkoxy RTV silicone | One-part neutral-cure RTV silicone |
| ASTM C920 Classification | Class 50 | Class 50 |
| Movement Capability | ±50% | ±50% |
| Water/Rain Ready | Approximately 30 minutes | Not stated in TDS |
| Tack-Free Time | Approximately 30 minutes | 3 hours at 50% RH |
| Published Cure Time | Approximately 24 hours | 7–14 days; full adhesion 14–21 days |
| Application Temperature | 40°F to 100°F | All-temperature gunability; do not install above 122°F |
| Structural Glazing | Not represented for structural glazing | Meets ASTM C1184; structural use requires Dow review and approval |
| Weather-Sealing Uses | Windows, doors, siding, trim and general sealing | Most common construction materials, including concrete and brick |
| Cartridge | 10.1 oz | 10.3 oz plastic cartridge |
Published manufacturer specifications are shown as stated in the applicable technical data sheets.
Comparative Overview
Origin Pro HP3 and DOWSIL™ 795 are neutral-cure RTV silicone sealants that meet ASTM C920 Class 50 requirements and provide ±50% movement capability. The products overlap in weather-sealing applications, but they are not represented as equivalent for every use. DOWSIL™ 795 is also designed and tested for structural glazing and architectural panel applications; Origin Pro HP3 is not represented for structural glazing.
Differences You Will Notice
For common window, door, siding, trim and weather-sealing applications, Origin Pro HP3 publishes approximately 30-minute water/rain readiness and approximately 24-hour full cure. DOWSIL™ 795 publishes a 3-hour tack-free time, 7–14-day cure time and 14–21-day full-adhesion period. DOWSIL™ 795 also offers ASTM C1184 structural-glazing performance and broader architectural applications that are not claimed for HP3.
Beyond the Product
Origin Pro’s Pro Dashboard makes buying simpler, faster and more organized. See pricing before you order, find and save color matches, track projects and past orders, and quickly reorder—all in one place.
Product Comparison Information
These comparisons are intended to help contractors evaluate differences in product features and manufacturer-published specifications when considering products for a particular application. Unless expressly stated, Legacy Sealants, Inc. has not conducted head-to-head testing of the referenced products. Information is drawn from manufacturer technical literature identified on the page and was available as of the date shown. Because test methods and conditions may differ by manufacturer, published values should not be treated as directly equivalent unless specifically noted.
Product names, trademarks, packaging and images are the property of their respective owners and are used solely to identify the products being compared. Legacy Sealants, Inc. is not affiliated with, sponsored by or endorsed by any referenced manufacturer.
Product formulations and specifications may change. Users should review current manufacturer technical literature and independently determine product suitability for their specific application.
Trademark Ownership
DOWSIL™ is a trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow.
Technical Literature
Origin Pro HP3 100% Silicone Sealant Technical Data Sheet, version dated August 11, 2026. DOWSIL™ 795 Silicone Building Sealant Technical Data Sheet, Form No. 61-885-01-0325 S2D, © 2017–2025 The Dow Chemical Company.