ALL-PURPOSE 1602 is a pressure sensitive, duct joint and general purpose rolled sealant. The fabric backing allows paint to be applied for a customized look. ALL-PURPOSE 1602 provides an instant aggressive grip to most surfaces including sheet metal, duct board, and flex-duct for indoor applications. The GRAY MATTER™ butyl adhesive/sealant is a 100% solids sealant, which stays flexible and does not release from the substrate. Thickness: 25 Mils. Tensile Strength: 790 PSI Average Sealant Material: Modified Butyl LEED compliant SCAQMD Rule 1168