Sashco 30501 0.5 in. x 100 ft. Coil Pre-Caulking Backer Rod

Backer rod is a foam-like material used to properly configure expansion/contraction joints and to provide a surface that either the sealant will not adhere to or will be so flexible in its own right that, even though the sealant adheres to it, does not hinder the needed movement capability of the sealant itself. Backer rod comes in long lengths of a circular profile and is pressed into the joint just before the sealant is applied.

• Size – 1/2 in. X 100 ft.

– SKU: LCST13601Sashco Pre-Caulking Backer Rod – Makes professional joints that last. Helps fill in and insulate large caulk joints and allows the caulking to absorb more movement. Caulking adheres to the sides of the joint, but not to the filler rope, which allows the caulking to stretch and compress without tearing or pulling away thus extending the caulk’s life and effectiveness. Made of closed cell poly foam. Minimum R value of 2.5/inch. Color: Gray. – Diameter: 1/2", Length: 100′, Color: Gray, Material: Poly Foam, Pkg Qty: 1, Package Type: Bag