Product Overview

CRL M64 is a highly effective one-part, moisture-curing, gun-grade modified polyurethane sealant. It boasts exceptional durability, flexibility, and performance in moving joints.

Key Features:

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

Primary Uses: CRL M64 Modified Polyurethane Construction Sealant has been specially formulated to surpass traditional VOC solvent polyurethanes for sealing moving joints in concrete, masonry, metal, and other basic perimeter joint applications. It is the ideal choice for ensuring a watertight installation in all joints between framing (door and window) and the building structure in both storefront and curtain wall applications. This advanced polymer formula offers excellent adhesion to fluoropolymer paint coatings for metal surfaces, including KYNAR®, Duranar®, and Duranar® Sunstorm™ Coatings, as well as standard metal, aluminum, steel, galvanized steel, plastics, vinyl, glass, wood, concrete, brass, and other common building substrates.

Product Warning: Limitations: Do not apply over damp or contaminated surfaces. Use with adequate ventilation. Not recommended for surfaces with special protective or cosmetic coatings without prior consultation of the manufacturer. It should not be applied to mirrors or unpredictably absorptive surfaces such as marble, limestone, or granite unless a standard of appearance has been agreed upon as a result of testing for stain and/or discoloration.