The Cummins DCA4 Supplemental Coolant Additive is designed to provide superior liner pitting and corrosion protection for your engine. This additive is effective in water-only systems and replenishes corrosion inhibitors to ensure your engine is well-protected. With its advanced formula, this coolant additive is proven to provide superior engine protection, extending the life of your engine and reducing the risk of costly repairs. Whether you're using it in a commercial vehicle, this coolant additive will keep your engine running smoothly. FleetPride is your First Click in Heavy Duty®.