BOSS – 380 Contractors RTV Silicone is a one-part acetoxy cure adhesive sealant that is suitable for general construction sealing and adhesive applications. This product will adhere to clean metal, glass, many types of wood, silicone resins, vulcanized silicone rubber, ceramics and plastic surfaces. Meets ASTM C920, Suitable for general construction applications, Movement Capability ±25% Service Temperature -40° to 400°F Tack-Free 10 – 20 minutes Meets ASTM C-920 Screw-on Nozzles included Provides weatherproof and waterproof seal Resists ozone, UV radiation and temperature extremes Fills and seals gaps around windows, doors, vents, fixtures and lights Seal electrical connections and boxes to waterproof Seal cracks in interior walls and ceilings, door joints and fixtures Seal leaks in gutters, downspouts, ducts and piping Seal cracks or gaps around windows, vents, ducts, fixtures and lights HVAC Sealing heating, ventilating or air conditioning duct work Bond gaskets in heating and refrigeration units