CRL 5/8" Closed Cell Backer Rod - 100' Roll Finish:Gray It must be oversized (50%)

It must be oversized (50%) to fit tightly into the joint

No primer is required on most construction materials

Water Clear Silicone cures quickly with a tack-free time of 10 minutes

Do not use with hot applied sealants

Technical Data

CRL 5/8" Closed Cell Backer Rod - 100' Roll Finish:Gray It must be oversized (50%)Allows 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