Unbranded 3/4 in x 59 ft Grey Foam Backer Rod Caulk Saver for Concrete Expansion Joints Gaps Driveways and Sidewalks

Gap filling supports sealant work in concrete joints, wall gaps and pavement cracks. This grey backer rod measures 3/4 in. diameter by 59 ft. long and is made from closed-cell polyester foam. The soft cylindrical rod bends to fit joint lines and helps control sealant depth. Use it before caulk or sealant on driveways, sidewalks, patios, foundations and masonry gaps. The closed-cell structure helps reduce water absorption and air leakage. Includes a 30-day limited warranty.