SKU cf75942-U
Foam backer rods are used in sealing joints where you want a stable backing for caulk or sealant. This roll provides a size of about 1 in. in diameter and 50 ft. in length, making it suitable for larger projects as well as smaller repairs. The foam material is non absorbent, which helps prevent moisture from wicking into the joint and reduces the chance of squeeze out during application. The flexible nature of the rod lets it fit into irregular gaps and curves, guiding the sealant evenly and creating a clean, professional appearance. When used properly, the backer rod acts as a compressible filler that supports the sealant and promotes adhesion without excessive settling. It is designed to be easy to handle and to unwind from the spool without tangling, which helps keep work neat and efficient. The product is versatile enough to address cracks, expansion joints in driveways and sidewalks, wood gaps, wall joints, and joints around doors and windows, as well as pavement joints in exterior projects. This makes it a practical addition to a basic caulking kit, offering a simple way to prepare joints before applying sealant. Using the right backing enhances sealant performance by controlling depth and reducing air pockets during installation.
