Sashco 30751 3/4" x 50' Coil Pre-Caulking Backer Rod Whizz roller cover filling even the largest of

filling even the largest of drywall repairs in one coat

Cleans up easily with soap and water when wet

To avoid over exposure

please call 3M technical support team at 1

Sashco 30751 3/4" x 50' Coil Pre-Caulking Backer Rod Whizz roller cover filling even the largest ofBacker rod is a foam like material used to properly configure expansion contraction joints and to provide a surface that either the sealant will not adhere to or will be so flexible in its own right that, even though the sealant adheres to it, does not hinder the needed movement capability of the sealant itself. Backer rod comes in long lengths of a circular profile and is pressed into the joint just before the sealant is applied.