Artrylin Backer Rod Foam Rubber 1/4" Diameter x 50ft Length Caulk Saver Sealing Household Doors, Windows, Cabinets Weather Stripping Seal for Concrete Filling Joints and Gaps (Black)

Black foam backer rod is made of 2.0 rubber foam, high flexibility.As a backer rod, it is suitable for pavement cracks, wall joints and foundations, expansion joints, door and window seam.Versatile to Use: You just need to cut the black foam rod into the length you need, put it in the gap to be filled, press it inside, and the operation is complete.Remember, BACKER ROD NEEDS TO FIT TIGHT.You will receive caulk strip about 50 ft, sufficient length can meet your daily needs and replacement.