Impact Automotive Corrosion Inhibitor Premix is a pre-mixed heavy-duty, long life organic automotive / stationary engine cooling system corrosion inhibitor. It is suitable for petrol, diesel and gas fuelled engines where anti-freeze/anti-boil protection is not required. It provides long-life corrosion protection for aluminium and ferrous alloys and is fully compatible with the rubber hoses and plastics commonly used in engine cooling systems.