The purest possible end-to-end diesel exhaust fluid solution delivered by our massive nationwide network.

BlueDEF® is a nontoxic solution of 67.5% purified water and 32.5% ultra pure automotive grade urea. BlueDEF® is not a fuel or fuel additive. Instead, when injected into the exhaust stream and passed over a catalyst, BlueDEF® helps convert NOx into nitrogen gas and water vapor — two harmless and natural components of the air we breathe.

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