XtraBond HT high temperature RTV silicone sealant is a one part, easy to use, non-slumping paste that cures to a silicone rubber when exposed to atmospheric moisture at room temperature. Xtrabond HT is engineered to provide a durable, watertight bond when exposed to continuous temperatures ranging from -80° to 500°F on a continuous basis while maintaining its integrity at up to 600°F for intermittent time periods. Its unique formulation acts as both a thermal and electrical insulator as well, so it is ideal for sealing around heating elements. Xtrabond HT adheres to most common construction substrates, is compatible with SBS flashing, can be painted over in 2 hours and has low VOCs. Industries served include commercial and residential construction and remodeling, truck and trailer and flooring. The substrate must be clean, dry, frost free, sound, and free of any oils, grease or incompatible sealers, paints or coatings that may interfere with the adhesion process. Do not apply if surface is damp or contaminated. It is recommended all substrates are tested prior to application.