Welcome to the home of the Green Demon, the world’s most advanced head gasket and block coolant leak repair. We’ll get you back on the road in no time at all!
Green Demon is safe to use in all water cooled engines from bikes right up to heavy duty trucks. Carefully engineered to permanently seal coolant leaks in the head, head gasket and block, Green Demon works safely with all types, brands and blends of coolant / antifreeze. Simply shake the bottle up, add it to your cooling system and drive.