Diesel Exhaust Fluid (DEF) is an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. It is a non-hazardous solution of 32.5% urea in 67.5% de-ionized water. DEF is clear and colorless, and looks exactly like water. It has a slight smell of ammonia, similar to some home cleaning agents. DEF is used in by Selective Catalytic Reduction (SCR) technology to remove harmful NOx emissions from diesel engines.

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Whether you are looking for 2.5 gallon cases, 55 gallon drums, 330 gallon totes or an even larger quantity bulk sized delivery, Ullman Oil is your one stop shop for DEF.  Call today for current pricing.