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Coolant Additives

Radiator Coolant Additive

DEI's highly acclaimed Radiator Relief line has expanded with the addition of several performance additives designed to increase the cooling efficiency of any stock or aftermarket cooling system. Reduce engine temperatures up to 30°F with new anti-foam formulas using corrosion inhibitors. Today’s gasoline- and diesel-powered motors aren’t as efficient as we’d like them to be but using DEI’s Radiator Relief radiator coolant additives can increase the cooling systems efficiency of any vehicle by working with the radiator to lower engine operating temperatures up to 30°F! Works with all coolants, water, or coolant/water mixtures.  Now available for gas and diesel engines!