Backer Rod 3/4" Closed Cell

2_0703188 MFG #: BCO.750SNTU0
$0.00 / BAG
Closed-cell backer rod is a polyethylene foam joint-filler and backing for elastomeric sealants. Its resilience accommodates dynamic joints. Backer rods are primarily used in expansion and contraction joints and are used to limit the depth of the sealant, help the sealant assume an optimum hourglass shape factor to prolong sealant life, and serve as a bond breaker to prevent bottom-side adhesion of the sealant.