CRL 1/4" x 3/8" x 2" Thermoplastic Rubber (TPR) Setting Blocks Finish:Black aiding in identifying the Low-e

aiding in identifying the Low-e coated surface

is designed specifically for the smooth installation of backer rod

Lasts 10 Times Longer Than a Steel Wheel

allows applications with new self-cleaning glass

Protect from freezing until fully cured

CRL 1/4" x 3/8" x 2" Thermoplastic Rubber (TPR) Setting Blocks Finish:Black aiding in identifying the Low-eCompatible With Silicone, Butyl, Polyurethane, and Polysulfide Sealants UV Stabilized CRL Thermoplastic Rubber (TPR) Setting Blocks are compatible with almost anything, meaning you can use them in designs calling for the use of modern structural glazing sealants. They are formed of a 90 durometer shore hardness thermoplastic rubber that performs as well as traditional neoprene setting blocks. They are available in the most popular sizes of neoprene