DEF Diesel Exhaust Fluid, 2.5-Gal.

Trcairdef, 2.5 gallon, diesel exhaust fluid, stabilization, colorless, non-flammable, non-toxic, a mixture of 32.5% high purity synthetic urea & 67.5% deionized water, used for catalytic reduction systems on diesel engines, def is the primary ingredient used to help convert nox to harmless nitrogen & water, classified as minimum risk for transportation.