Race engine coolant. Boiling point of 204°C at 7psi, with no boil over. Eliminates detonation caused by localised hot spots by preventing these as well as eliminating cavitation. Can be used with OEM water pumps. This coolant will transfer 27.5% more heat energy than water in your race engine, due to NPG's molar heat of vaporization and high saturation temperature. Recommended for all high performance, race, vintage, fast road, top fuel or motorcycle engines. NPG coolant is accepted by most racing sanctions where it is stipulated as " No Antifreeze". Verification would need to be sought from your rule book regarding coolant requirements to be sure. Please note that to get the BEST performance no higher than a 7psi cap should be used. Freezes at -23°C. Used in FORMULA 1, NASCAR, NHRA, SCCA, IMSA, IRL, Grand American, NMCA, ARCA, AMA, WERA, American Lemans, SCORE Off Road, World Rally up, and numerous Boat Racing Venues.