Sashco 30751 3/4" x 50' Coil Pre-Caulking Backer Rod Whizz roller cover This is commonly purchased in

This is commonly purchased in conjunction with spray guns that do not have a built in gun swivel

Very strong adhesive

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SAFETY DATA SHEET(SDS) ME221GAL

Sashco 30751 3/4" x 50' Coil Pre-Caulking Backer Rod Whizz roller cover This is commonly purchased inBacker 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.