Legacy Pro Sealants are engineered for professional
installers — combining strong adhesion, flexibility, and movement capability
appropriate to each product category.

Where specified in the Technical Data Sheet (TDS), products
meet or exceed ASTM C920 performance classifications, including:

• ASTM C920 Type S, Grade NS, Class 50 (HP1, HP2, HP3, HP4)
• Use G & O classification (HP3)
• AAMA 800 (Sections 4 & 5), ASTM C1382 (EIFS), and AAMA 713-24
  compliant (HP4)

Cure systems vary by product (neutral-cure, acetoxy-cure,
or hybrid polymer). Refer to each product’s TDS for full technical
specifications, cure times, and application limitations.

HP1 / HP2 – Kitchen, baths, laundry and utility rooms

(Neutral-Cure 100% Silicone – 2.8 oz & 10.1 oz)
____________________________

HP3 – Exterior glazing and perimeter sealing including glass-to-glass, glass-to-metal, storefront systems, curtainwall perimeters and skylights.

(Acetoxy-Cure 100% Silicone – ASTM C920 Class 50, Use G & O)
____________________________

HP4 – Siding, windows, trim, flashing and roofing applications

(Hybrid Polymer – paintable, ±50% movement capability)
____________________________

Refer to each product’s Technical Data Sheet for compatible substrates and application guidance.

Yes.

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

Always consult the individual Technical Data Sheet for complete classification details.

Each HP4 cartridge includes a precision-engineered V-notch nozzle designed to help deliver a smooth, consistent bead – particularly useful for detailed joints and multi-crew applications requiring uniform results.

Yes. HP4 Hybrid Polymer Sealant draws from a color library of more than 200 established standards, covering over 5,000 coordinated matches aligned with leading siding, window, and trim brands.

Initial Launch (2026): Core 4 (White, Black, Brown, Gray) plus Clear

Expanded colors are introduced in phases based on contractor demand and production scheduling.

Custom color development may be available for qualified contractor accounts.

Yes. While not specifically labeled as a gutter sealant, HP4’s hybrid polymer formulation and ±50% movement capability make it well-suited for many exterior sealing applications, including gutter joints.

Always ensure surfaces are properly prepared and free of standing water prior to application.

Legacy products are backed by decades of professional sealant industry experience. Each formula is engineered for modern jobsite performance and manufactured to meet published professional standards for adhesion, flexibility, and durability.

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

Legacy Pro reflects a family legacy in professional sealants that began in 1966 with the founding of Ohio Sealants, Inc. (OSI®) in Wickliffe, Ohio.

Today, Pete and Mark Longo bring that experience forward through Legacy Sealants — a modern platform built for contractors seeking high-performance sealants, expanded color capability, and a direct-to-contractor purchasing experience.

Built on decades of category expertise, Legacy Pro is focused on delivering dependable performance and practical innovation for today’s jobsite.

Application Temperature (All HP Products):

0°F to 120°F
(Substrates must be clean, dry, and free of frost or ice.)

Service Temperature:

• HP1 / HP2 / HP3: -40°F to 300°F
• HP4: -40°F to 200°F

Refer to each product’s Technical Data Sheet for complete temperature and performance details.

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