Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is a mixture of 32.5% high purity urea and 67.5% deionized water that is used in Selective Catalytic Reduction (SCR) systems on 2010 and newer diesel engines. DEF is the primary ingredient used in the exhaust to help convert NOx to harmless nitrogen and water. DEF is stable, colorless, non-flammable, and non-toxic. DEF is classified as minimum risk during transportation.

DEF is a higher grade of urea and includes cleaner components than what is commonly used for agricultural liquid fertilizer.

Recommended storage between 12 and 90 F will give DEF a shelf life of approximately two years. DEF can freeze and thaw without hurting the integrity of the product. DEF needs to be stored inside out of sunlight and heated during the winter to be able to fill your vehicles.

DEF is a chemical and must be handled differently than fuels and/or lubricants. The purity of DEF must be maintained so that it will not harm your vehicles SCR system. Care must be taken regarding the materials of tanks, pumps, meters, hoses, and nozzles that will come into contact while storing and/or dispensing DEF. 

Stainless steel and certain types of plastics that are free of additives are approved. Do not use carbon steel, aluminum, copper, etc. These types of containers or fittings will leech into the product contaminating the DEF and causing failure in you SCR system. Eventually non-approved materials will fail creating a leak or rupture your storage system.

As any operator knows, the purity of diesel exhaust fluid is essential for allowing engines and selective catalytic reduction (SCR) systems to operate at their peak performance, while at the same time reducing harmful pollution. Produced using deionized water and our proprietary reverse osmosis water purification system that exceeds stringent ISO 22241 and American Petroleum Institute standards, Blue Sky DEF prevents SCR breakdown, reduces harmful nitrogen oxide emissions by 90% and even improves fuel efficiency by up to 8%. 

Blue Sky is more than just a manufacturer of high-quality diesel exhaust fluid. We are the DEF experts. Our representatives work with you to develop customized DEF programs and strategies to meet your needs, regardless of whether you are in charge of a modest truck fleet, a large rail or marine business, a sprawling power generation station, or anything in between. With quantities ranging from bottle to bulk, we have the right solutions for you.

We provide DEF through sealed totes or barrels, drums, and jugs. Transport delivery upon request. Our bulk DEF system uses dedicated tanks, pumps and meters, all dispensed through a closed 1 micron filtered system. When you have a Micromatic connection on your storage tank, we can fill your onsite bulk DEF tank with the same product integrity of our closed 1 micron filtered system through a state certified meter.