CRL Gray Textured Polyurethane Construction Sealant Cartridge

• One-part grainy textured finish formula with primerless adhesion on most common construction surfaces including KYNAR® coated metals
• AAMA approved
• VOC compliant - only 9 g/L
• UV resistant / non-yellowing

SKU: M66GRY

CRL M66 is a one-part, moisture-curing, gun-grade modified polyurethane construction sealant formulated for moving joints. It provides durable, permanently flexible performance without a primer on most common construction substrates and fluoropolymer-coated metals (KYNAR®, Duranar®, Duranar® Sunstorm™). Ideal for storefronts, curtain walls, perimeter joints, and glazing toe/heel beads.

Key benefits & long‑tail keywords:

• Exceptional adhesion to KYNAR coated metal — ideal KYNAR coated metal sealant for storefront and curtain wall installations
• Low-VOC polyurethane construction sealant — VOC compliant at only 9 g/L (chemically curing <3%)
• UV resistant, non-yellowing formula for exterior perimeter joint sealing
• Permanently flexible: resists hardening with age and remains flexible at low temperatures
• Paintable with water-based paints after 2 hours
• Fast cure: skins over ~30 minutes, cures ~1/8" (3 mm) per day
• Works on metal, aluminum, steel, galvanized steel, plastics, vinyl, glass, wood, concrete, brass and common building substrates

Applications: Sealing moving joints in concrete, masonry, metal, perimeter joints around doors and windows, insulating glass compatibility, travel trailers, mobile homes, and galvanized HVAC ductwork assembly.

Performance: Service temperature after full cure: -75°F to 300°F (-59°C to 149°C). Low-temperature gunning and application above 0°F (-18°C). Tooling time approximately 20–40 minutes (varies with temperature and humidity).

Features:
Exceptional adhesion to KYNAR® coated metals.
Solvent-free, isocyanate-free, eco-friendly. Qualifies for LEED EQ credit.
USDA approved for use in meat and poultry areas. Meets CARB 2003 VOC requirements.

Technical data & certifications:
Meets Federal Specification TT-S-00230C, Type II, Class A. ASTM C920-98, Type S, Grade NS, Class 25, Use NT, M, T, A, G, and O. Also conforms to multiple ASTM standards listed on the product specification and CAN/CGSB-19,13-M87 QPL #81026. AAMA 808.3-92 Exterior Perimeter and AAMA 802.3-92 Type II ductile back bedding compound.

Limitations & warnings: Do not apply to damp or contaminated surfaces. Use with adequate ventilation. Not recommended for surfaces with special protective or cosmetic coatings without manufacturer consultation