Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)

Gray Foam Backer Rod 1/2in x 20ft for Caulking Gaps
✔️ 1/2in (12.7 mm) diameter foam backer rod, 20 ft (6.1 m) roll

This gray foam backer rod is a flexible sealing filler used to prep joints before caulking. It helps create a clean base for sealants and works well in expansion joints for sidewalks, driveways, roofs, and concrete gaps. Suitable for indoor and outdoor use and easy to trim for custom fits.

✅ 1/2 in diameter foam backer rod fits standard expansion joints
✅ 20 ft length covers long gaps in concrete, sidewalks, and driveways
✅ Weather-resistant foam for indoor and outdoor use
✅ Easy push-in installation and trim to size before caulking
✅ Creates a solid base for caulk, improving adhesion and durability

💡 What is a foam backer rod used for in sealant jobs? This handy filler helps prep joints for caulk and improve seal performance.
- Keeps caulk from sagging in deep joints
- Provides a stable backing for better adhesion of sealants
- Works in expansion joints in concrete, sidewalks, and roofs
- Trims to fit exact gap sizes