M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet, (Pack of 2) (71464)
M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray