CRL 3/8" Closed Cell Backer Rod - 100' Roll Finish:Gray It withstands hot and cold

It withstands hot and cold temperature extremes from -45° to 160°F (-43° to 71°C)

Primerless Adhesion to Most Substrates

1-1/2" (38 mm) Long Stainless Steel Needle

or for exterior or interior sealing below the waterline in marine applications

Putty must be painted after it has skinned over and attained a firm set

CRL 3/8" Closed Cell Backer Rod - 100' Roll Finish:Gray It withstands hot and coldAllows Easy Control of Sealant Application Thickness Preferred for Exterior Installations Where a More Positive Seal is Required 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