BackerRod
Backer rod is a flexible, cylindrical foam material used as a backing in joints that are to be sealed with sealant. It is typically made from polyethylene or polyurethane. The primary purpose of backer rod is to control the depth of the sealant. By inserting a backer rod into a joint, the installer can ensure the sealant achieves the correct width-to-depth ratio, which is crucial for its performance and longevity.
Proper sealant tooling relies on achieving this ratio. A joint that is too deep relative to its
Backer rod comes in various diameters to suit different joint sizes. It is generally available in closed-cell