Soft Backer Rod is a soft, grey, pliable, non-gassing back-up material inserted into an expansion or contraction joint to:
Control sealant depthCreate a backstop to allow proper sealant toolingEnsure sealant adhesion to joint surfaces onlyAnd yield a proper bond break between back-up
material and sealant.It can also be used as a temporary joint seal
Multiple Diameters Available:
3/8", 5/8", 7/8", 1-1/8", 1 1/2", 2", 2 1/2", 3", 4"