Product Overview

CRL M64 is an exceptional one-part, moisture-curing, gun-grade modified polyurethane sealant that stands out due to its remarkable durability, flexibility, and superior performance in moving joints. Notably, it doesn't demand a primer on most common construction surfaces.

Key Features:

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

Primary Uses: CRL M64 Modified Polyurethane Construction Sealant has been meticulously designed to outperform traditional VOC solvent polyurethanes when it comes to sealing moving joints in concrete, masonry, metal, and other basic perimeter joint applications. It is particularly suitable for securing a watertight installation in all joints between framing (door and window) and the building structure, in both storefront and curtain wall applications. Additionally, this advanced polymer formula provides outstanding 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.