Williams Lubricants is now your premier area distributor offering and suppling quality bulk DEF delivered directly to your door. DEF Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year truck, many diesel pickups, SUVs, and newer off road equipment. DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank. We are a Fleet Supplier that can deliver to your location. Our DEF products are safe and effective for use in cars, trucks, tractors, off road equipment, or any diesel-powered engine that utilizes SCR technology. DEF is also a very safe product to handle as it is not flammable or explosive When stored properly, DEF has a shelf life of approximately 18 months. It is available in cases, drums, totes and bulk.