Master Bond Master Sil 803 is a ready-to-use, one component high performance silicone elastomer compound for bonding, sealing, protective coatings and formed-in-place gaskets. This material is a clear noncorrosive flowable compound which can be easily handled and processes readily. It cures at ambient temperatures to a flexible rubbery solid when exposed to atmospheric moisture. Master Sil 803 is an excellent electrical insulator and provides vibration and shock protection for delicate electronic components. It remains flexible and provides excellent service over the exceptionally wide temperature range of -180°F (-115°C) to +500°F (260°C). Color is clear. Master Sil 803 silicone adhesive/sealant is widely employed for its reliable and high quality performance for bonding, sealing and joining metal, plastics, electrical insulations, protective coatings, formed-in-place gaskets and encapsulation of sensitive electronic components.