Vulkem116 is an excellent general-purpose sealant for construction applications, it is a textured, single-component, moisture-curing, gun-grade polyurethane sealant. Vulkem 116 has a 30-year history of delivering superior primer less adhesion to porous substrates, which makes it the choice for sealing expansion joints in commercial construction applications. Suitable for certain water immersion applications. Cure of the sealant can be accelerated with the addition of Vulkem Catalyst 45/116 as needed. U.S. Federal Specification TT-S-00230C, Class A, Type II, CAN/CGSB-19.13-M87. USDA regulation for indirect food contact. Canadian Food Inspection Agency. City of Los Angeles (COLA) approval standards.