A product that chemically dissolves deposits of scale and oil as well as the sludge from the inner surfaces of the radiator and the engine. It does not affect the radiator's materials. It is recommended for every radiator and cooling system. APPLICATION We run the engine at a standstill until it warms up well (10 - 30 minutes). We add the contents of the bottle to the radiator. We turn the heater on. We let the engine run for about 30 minutes at a standstill, or we drive the car normally for one to two days. We stop the engine and let it cool. We drain the cooling system and rinse with clean water until it is completely clean. We fill with a water/antifreeze mixture.