Royal Purple - Purple Ice

PURPLE ICE is a high performance, synthetic, radiator coolant additive for both gasoline and diesel engines.

PURPLE ICE is a high performance, synthetic, radiator coolant additive for both gasoline and diesel engines. Purple Ice is formulated to reduce the surface tension of the coolant, which improves heat transfer through the cooling system while providing additional protection against rust, corrosion and, erosion. It also prevents the formation of scale deposits in the radiator for optimum coolant flow and lubricates the seals of the water pump.