ELEMENTS AF549 is a one part, moisture curing, room-temperature vulcanizing Silicone sealant for industrial applications and construction uses. ELEMENTS AF549 is ideal for applications where high levels of protection, adhesion, elasticity and longevity are desired. It provides long-term, permanently flexible bonding and sealing, as well as excellent adhesion to glass, metal, porcelain, ceramic, wood, some plastics and many other nonporous substrates.