Features and Benefits ? Helps to maintain coolant flow in radiators ? Reduces deposit formation in radiators ? Provides powerful corrosion protection for all metals found in engines e.g. aluminium, cast iron, etc ? Helps reduce coolant temperature by up to 15 degrees Product Information Extra Cool is a corrosion inhibitor and coolant enhancer concentrate, designed to be added to coolant to help maintain flow and reduce deposit formation in radiators, and reduce coolant temperature by up to 15?C. Provides powerful corrosion protection for all metals found in engines. Can be used in motorsport applications where antifreeze is disallowed.