Master Bond MasterSil 415 is a ready-to-use, one component high performance silicone elastomer compound for bonding, sealing and protective coatings featuring high transparency. It has a paste consistency and will not sag, slump or run off surfaces. It cures at ambient temperatures to a flexible rubbery solid when exposed to atmospheric moisture. MasterSil 415 is an excellent electrical insulator and provides vibration and shock protection. It is an acetoxy type silicone system, releasing acetic acid upon cure. MasterSil 415 has exceptionally high flexibility at lower temperatures and remains flexible over the extremely wide temperature range of -185°F to +400°F. It also has superb weatherability and moisture resistance. MasterSil 415 silicone adhesive/sealant is widely employed for its reliable and high quality performance for bonding, and sealing metal and most plastics where transparency is a critical factor. It also the silicone of choice when low temperature serviceability is of major importance. It is widely used in optical and display type applications.