Before Caulking, Use Backer Rod To Help Fill Gaps And Openings In Pavement Cracks, Wall Joints, Foundations, Sidewalks And Driveways.The Gap Filler Helps Cushion And Insulate And Helps Prevent 3-Point Bonding.
 ▪  Provides A Sound Surface For Caulking Project
 ▪  For Use In Expansion Joints In Driveways And Sidewalks
 ▪  Moisture Resistant
 ▪  Mfg #WS31543
 ▪  Made In Canada