Granville XHT Instant Gasket is an extra high temperature one component silicone sealant especially developed for areas that are exposed to high temperatures. XHT Instant Gasket is ready to use in a double-piston aerosol powercan. Product Benefits * Resists temperatures up to 300°C intermittent * Suitable for use, when fully cured, on vehicles with catalytic converters * Allows controlled application * Gives a professional finish * Considerably reduces wastage of expensive silicone Product Usage For sealing and gasketing of components that are subject to high temperatures. Not recommended for use on head gaskets or parts requiring continuous immersion in petrol. Product withstands high temperatures up to 300°C intermittent. When used on vehicles with catalytic converters ensure product is totally cured before running engine. Full cure takes 24 hours. Directions for Use Surfaces must be stable, clean and free of oil, grease and old gasket matter. Remove cap by pulling firmly. Rotate flow control adjacent to trigger approximately 10mm. Place the nozzle at start of joint to be filled. Press trigger and draw nozzle along joint/surface in one continuous movement. Rate of sealant flow can be regulated by rotating flow control. When finished, return flow control to starting position indicated by MIN and replace cap to reduce curing in nozzle. If joint is to be dismantled at a later stage smear oil lightly onto one surface and bolt down. Do not overtighten bolts. Storage Instructions Store in a cool, dry place away from direct sunlight and sources of ignition. Shelf Life Unopened - 18 months from date of manufacture.