CRL Limestone Smooth Polyurethane Construction Sealant - Cartridge

Discover the superior capabilities of CRL M64, a one-part, moisture-curing, gun-grade modified polyurethane sealant that offers primerless adhesion on most construction surfaces, including KYNAR® coated metals.
This AAMA approved, VOC compliant (only 9 g/L) formula is UV resistant and non-yellowing, making it ideal for both interior and exterior applications.
CRL M64 is specially designed for sealing moving joints in concrete, masonry, and metal, providing exceptional adhesion to a wide range of surfaces including fluoropolymer paint coatings.
With a fast cure time, paintability within two hours, and exceptional performance in temperatures ranging from -75°F to 300°F, CRL M64 stands out as an eco-friendly, flexible, and durable solution for construction projects, securing a watertight installation in storefront and curtain wall applications.