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. It has a slight smell of ammonia, similar to some home cleaning agents. DEF is used in Selective Catalytic Reduction (SCR) technology to remove harmful NOx emissions from diesel engines. 

Small and Sons can make bulk deliveries of in one of our specialized bulk trailers dedicated and equipped to carry DEF. We can also deliver 275 or 330 gallon “totes” in one of our enclosed box trucks.