1 Closed Cell Backer Rod/Crack Filler (25 ft)
$3.30
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Fill large cracks Save caulk Keep caulk from ripping loose Fill large s Backer rod is important when sealing large gaps. It allows caulk to span a gap without ripping loose. In the example above backer rod is used where the radon pipe enters the floor before caulk is applied. 1 backer rod is perfect for filling gaps 3/4 to 1-1/8 wide. Sold in 25 foot lengths. Fill large cracks Keep caulk from ripping loose Fill large s
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