Designed with carbon black materials, STYROFOAM CAVITYMATE Ultra Insulation absorbs infrared radiation, slowing transmission through the foam and lowering heat flow. Special 16-in. width with square edges on all four sides makes it easy to fit between brick ties in cavity wall applications. It also offers high moisture resistance and durability, and is available in butt edge and shiplap edge treatments. Dow Building Solutions. 866-583-2583.