CRL 1-1/4" Closed Cell Backer Rod - 400' Case Putty Knives & Caulking Spatulas The complete set includes seven

The complete set includes seven tools held together with a snap ring

After application

and cures in 12 to 24 hours

and safest way to install backer rod

Apply a continuous bead of Moistop Sealant to the perimeter of the rough opening or to the backside of the mounting flange (D) of the window

CRL 1-1/4" Closed Cell Backer Rod - 400' Case Putty Knives & Caulking Spatulas The complete set includes sevenAllows Easy Control of Sealant Application Thickness Won't Adhere to Sealants; No Bond Breaker Needed Compatible with All Cold Applied Sealants CRL Closed Cell Backer Rod is a round, flexible, closed cell polyethylene foam with an exterior "skin" used as a backing and thickness control device for elastomeric and other cold applied sealants. The Backer Rod becomes an integral part of the joint into which it is installed, and therefore is available in a