Radiator Complete Care Radiator Treatment is a corrosion inhibitor built to be used in the cooling systems of most types of water cooled internal combustion engines. It is specially formulated to inhibit the development of rust and scale and forms a protective film that lubricates water pump bearings and prevents frictional wear. Improves heat dissipation and helps to prevent coolant overheating and boiling. It mixes with all types of antifreeze and contains no acids, thus it is safe for all cooling system metal parts and hoses.