Pre-Mix 50/50 Antifreeze & Coolant is a low silicate formulation that provides outstanding corrosion protection. In addition, Pre-Mix 50/50 Antifreeze & Coolant contains an advanced additive inhibitor system to provide broader range protection than most coolants. This includes ingredients to disperse minor oil leakage, suppress foaming, prevent fouling and control hot surface scaling. Premium conventional antifreeze formulation contains sufficient nitrite levels so that it can be used in both passenger car and trucking fleets without the need for any additional pre-charge.