CRL Black 7/8" Open Cell Backer Rod - 100 Foot Roll Putty Knives & Caulking Spatulas and it is non-corrosive to

and it is non-corrosive to most building materials such as glass (including insulating glass)

Controls Depth of Sealant and Acts as a Bond Breaker

metal or plastic signs

or if using a latex paint

CRL Black 7/8" Open Cell Backer Rod - 100 Foot Roll Putty Knives & Caulking Spatulas and it is non-corrosive toOpen Cell, No Skin, Non Gassing Rod is Compatible With All Cold Applied Sealants Controls Depth of Sealant and Acts as a Bond Breaker Soft, Compresses Easily CRL Open Cell Backer Rod is a soft, round, and easily compressible open cell polyurethane foam. Open Cell Backer Rod is not adversely affected by dynamic joint movement, and its inherent flexibility applies itself to joint variations very easily. It is ideal for use in situations where joint