TOTACHI Super Long Life Coolant Red -37°C (50/50) is free from nitrites, borates, amines, and silicates to safeguard cooling systems from corrosion, scale, and rust. It forms a long-term protective film on the internal surface of the cooling system to prevent boiling, overheating, freezing, cavitation, pitting, contamination and leaking of radiator and water pumps. Highly compatible with cast iron, aluminum, all ferrous alloys, rubber, seals, gaskets, and all components of the cooling system.