CRL 5/8" Closed Cell Backer Rod - 1550' Case Finish:Gray Extensive material testing has shown

Extensive material testing has shown that the following substrates must be tested for good adhesion

to surfaces which will be painted

A 1" (25 mm) bead at room temperature can be cut within one hour

They hold securely between the cartridge and the end of the caulking gun

and free of frost

CRL 5/8" Closed Cell Backer Rod - 1550' Case Finish:Gray Extensive material testing has shownAllows Easy Control of Sealant Application Thickness Won't Adhere to Sealants; No Bond Breaker Needed Compatible with All Cold Applied Sealants CRL Closed Cell Backer Rod is a round, flexible, closed cell polyethylene foam with an exterior "skin" used as a backing and thickness control device for elastomeric and other cold applied sealants. The Backer Rod becomes an integral part of the joint into which it is installed, and therefore is available in a