The Fleetguard Fleetcool EX™ Engine Antifreeze / Coolant 50/50 Premix is designed to protect your engine from liner pitting and corrosion. This coolant is compatible with other coolants and SCA's, allowing you to extend your maintenance intervals. It is formulated with advanced inhibitors to protect against rust, corrosion and cavitation erosion. It also contains a patented organic acid technology that helps protect against liner pitting and corrosion. This coolant is designed to provide superior protection for all types of engines, including gasoline, diesel and natural gas. It is also compatible with all types of metals, including aluminum, copper, brass and cast iron. With this product, you can rest assured that your engine is protected from the damaging effects of corrosion and pitting. FleetPride is your First Click in Heavy Duty®.