C.R. LAURENCE 777BRZ CRL Bronze 777 Butyl Rubber Sealant

C.R. LAURENCE 777BRZ CRL Bronze 777 Butyl Rubber Sealant. CRL 777 Butyl Rubber is a unique, butyl-based sealant specially formulated using a blend of age resistant polymers to give excellent weathering properties at various temperature extremes. CRL 777 offers excellent adhesion to most clean surfaces, and will withstand joint movement of 10% without affecting its water-tightness. It also has a special ultraviolet fighting agent for exceptional service life.. Part Numbers Variations: 777BRZ