Product Overview

CRL Closed Cell Backer Rod is a round, flexible, closed-cell polyethylene foam with an exterior "skin." It is 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. It is available in a range of diameters to accommodate joints from 3/16" to 1-5/8" (5 to 41 mm). The Backer Rod limits the depth of the sealant, preventing excessive use of the sealant and promoting proper joint design. Because the sealant will not bond to the "skin" of the rod, it can stretch and recover with joint movement, with minimal stress being put on the points of adhesion to the substrate.

Key Features:

• Allows Easy Control of Sealant Application Thickness.
• Won't Adhere to Sealants; No Bond Breaker Needed. 
• Compatible with All Cold-Applied Sealants.

Product Warning: 

NOTE: Do not tear, puncture, crease, compress, or stretch the Backer Rod during insertion. Always use the correct size Backer Rod for the particular application. Refer to the size selection chart. Do not use with hot-applied sealants or hot melt adhesives when their surface temperature is over 160ºF (71º C).

This product is sold in 100 Feet per order and does not come on a roll.