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KOOL-IT Supreme Coolant Treatment is chemically engineered to reduce the surface tension of a coolant, thus allowing it to more deeply penetrate metal surfaces at vital heat transfer areas. This decreases operating temperatures and significantly reduces the possibility of engine overheating. KOOL-IT is ideal for: Cars, Trucks, RV’s, Towing applications and Racing/performance vehicles. Benefits include: Enhances heat transfer and reduces operating temperatures Extends coolant life up to 5 years Prevents cooling system corrosion Protects all metals from electrolysis Prevents deposits which lead to overheating Reduces wet-sleeve cylinder liner cavitation erosion This product does not contain ethylene glycol.