This is a general purpose automotive cooling system corrosion inhibitor concentrate. It will not reverse pre existing corrosion problems. It is not an anti-freeze/anti-boil type coolant and should not be used in conflict with engine manufacturers recommendations.
SDS: Rust Inhibitor
A heavy-duty, long life organic corrosion inhibitor that will provide excellent corrosion protection to the cooling system of all petrol, diesel and gas fuelled engines where anti-freeze anti-boil protection is not needed.