Frequently Asked Questions

Product Performance and Usage

How do Origin Pro Sealants perform?

Origin Pro Sealants are engineered for professional installers, with product-specific performance documented in each Technical Data Sheet (TDS). HP3 is a 100% silicone sealant and HP4 is a hybrid polymer sealant. Review the current TDS for movement capability, cure behavior, compatible substrates, and application limits.

What are the best uses for each Origin Pro product?

HP3 – 100% Silicone Sealant

  • Kitchen and bath sealing
  • Windows and doors
  • Interior and exterior joints where 100% silicone is appropriate

HP4 – Hybrid Polymer Sealant

  • Siding, trim, windows, doors, flashing, roofing, and other construction joints
  • Applications where paintability, color matching, and broad substrate compatibility matter

Refer to each product’s Technical Data Sheet (TDS) for substrate compatibility and application guidance.

Do Origin Pro Sealants meet ASTM standards?

Yes. Current product-specific classifications are documented in each Technical Data Sheet (TDS).

  • HP3: ASTM C920, Type S, Grade NS, Class 50
  • HP4: ASTM C920 Type S, Grade NS, Class 25, Use NT, A, G and M

Always consult the current TDS for complete classification and application details.

What is the HP4 V-notch nozzle?

Each HP4 cartridge includes a precision-engineered V-notch nozzle that ensures smooth, consistent bead delivery – ideal for multi-crew applications or detailed joint work.

Do you offer color matches for siding and window applications?

Yes. Our HP4 Hybrid Polymer Sealant draws from a color library of more than 200 established standards – covering over 5,000 pre-matched options that coordinate with leading siding, window and trim brands. 

  • 2026 Launch: 15 stocked colors plus Clear for over 1500 color matches. Plus 20 pre-formulated colors made to order within 2-4 weeks delivery to expand color matches to 3500+
  • Custom color development is available for qualified contractor accounts. 

Can I use HP4 as a gutter sealant?

Yes. While not listed on the cartridge label, HP4 performs exceptionally well for gutter sealing applications.

Why should I trust Origin Pro Sealants?

Origin Pro products are backed by decades of professional sealant-industry experience. Each formula is developed for modern jobsite performance and supported by product-specific technical documentation for professional use.

How do I find the perfect color match for my project?

Origin Pro features an easy-to-use “Match My Color” system for HP4 Hybrid Polymer Sealant, helping contractors identify coordinated options for siding, window, and trim applications.

How did Legacy Pro become Origin Pro?

Legacy Pro was the earlier brand built on the Longo family’s history in professional sealants, which dates back to the 1966 founding of Ohio Sealants, Inc. (OSI®) in Wickliffe, Ohio.

Today, the products and contractor-focused platform continue under the Origin Pro Sealants brand. Legacy Sealants Inc. remains the legal company behind Origin Pro.

Quick Facts

Product Differences

HP3 and HP4 serve distinct applications across 100% silicone and hybrid polymer technologies.

Paintability

HP3 ❌ Not paintable

HP4 ✅ Paintable; follow the current TDS and test compatibility first.

ASTM/AAMA Standards

HP3: ASTM C920 Class 50.

HP4: ASTM C920 Class 25.

Color Offering

HP3: Clear & White.

HP4: Stocked colors plus an expanded Made-to-Order color program and custom color matching.

Low VOC/LEED

All HP-series meet EPA Method 24, CARB, and qualify for LEED® credits.

Exterior Use

HP3 (100% Silicone) & HP4 (Hybrid Polymer) for outdoor applications.

VOC & Shelf Life

See the current HP3 and HP4 Technical Data Sheets for VOC and shelf-life specifications.

Origin

Formulated & produced in the U.S.A.; HQ in Mentor, Ohio.

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