Versachem Super Blue Silicone is a high performance gasketing material that cures into a strong silicone rubber that is excellent for filling, sealing, bonding or weatherproofing. This moisture curing silicone maintains long term durability and flexibility, resists aging and weathering, and will not harden, shrink or crack. Works best on gaskets on valve covers, water pumps, oil pans, rear end covers, and thermostats. The OEM (Original Equipment Manufacturer) approved formula is low volatile, oxygen sensor safe, and resistant to oil, water and antifreeze mixtures. Tensile strength up to 500 psi (intermittent), with a temperature range of -65F to 400F (continuous) and -65F to 600F (intermittent).