Legacy Pro Sealants are built to meet or exceed the demands of professional installers – combining high adhesion, flexibility, movement capability, and fast cure times. All products are independently tested and manufactured to align with key industry standards, including;

• ASTM C-920 performance classifications
• Class 50 movement capability (HP1, HP2, HP4)
• Tack-free and full cure times suited to jobsite speed
• Low odor, neutral-cure or moisture-cure chemistries depending on use

• HP1/HP2 – Kitchen, baths, laundry and utility rooms (Interior 100% Silicone – 2.8 oz & 10.1 oz)
• HP3 – Exterior window, door, siding and trim (Clear/White 100% Silicone)
• HP4 – Siding, windows, trim, flashing and roofing (Hybrid Polymer with color-match and V-notch nozzle enhancements)

Yes.

• HP1 / HP2 / HP3: ASTM C920 Type S, Grade NS, Class 50
• HP4: ASTM C920 Type S, Grade NS, Class 50; AAMA 800 (Sections 4 & 5); ASTM C1382 (EIFS); AAMA 713-24 compliant

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.

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.

• Soft Launch (2025): Core 4 (White, Black, Brown and Gray) plus Clear
• 2026 Expansion: Additional colors will be introduced based on contractor and field demand.
• Custom color development is available for qualified contractor accounts.

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

Legacy products are backed by over 60 years of combined experience in sealant and construction materials innovation. Each formula is engineered for modern jobsite performance and rigorously tested to meet professional standards for adhesion, flexibility and durability.

Legacy Pro features an easy-to-use "Match My Color" database for HP4 Hybrid Polymer Sealant.

Legacy Pro is more than a name – it's a tribute to a family heritage in the professional sealant industry. The Longo family's connection this category dates back to 1966, when Ohio Sealants, Inc. (OSI®)was founded in Wickliffe, Ohio. Decades later, Pete and Mark Longo reunited with the industry to launch Legacy Sealants – a new platform designed for today's contractor, blending proven performance with modern color-matching technology and direct-to-jobsite delivery.

• HP1 / HP2 / HP3: -20°F to 120°F
• HP4: 32°F to 120°F (substrate must be free of frost/ice)

Yes. All HP-series sealants meet EPA Method 24 and CARB standards and are compliant in all U.S. states.