Gold Eagle Cooling System Rust Protector is designed to protect the cooling system and extend life by preventing corrosion. Rust protector will also condition, quiet, and lubricate water pumps for extended performance. This additive is a clear, soluble formulation that offers rust protection for iron, reduces "white rust" corrosion on aluminum, and greatly reduces galvanic corrosion on metals found in the automotive cooling systems. This formula is compatible with all extended-life and regular anti-freezes. Treats up to 16 quarts of coolant. 12 oz. Greatly reduces corrosion Compatible with all anti-freeze formulas | Rust Stopper, 12 oz in Gold