LOCTITE SI 596 Red High Temp RTV Silicone Adhesive Sealant makes gaskets that resist temperatures to 600F (315C) intermittent. Resists aging, weather and thermal cycling without shrinking, cracking or hardening. Fills gaps to 0.25". Your benefits Resists ageing, weathering and thermal cycling without hardening, shrinking or cracking Typically used in applications with an operating range of -50C to +250C