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  Diesel Exhaust Fluid (DEF)
Diesel Exhaust Fluid (DEF) One Gallon
Diesel Exhaust Fluid (DEF) One Gallon
Diesel Exhaust Fluid (DEF) Drum
DEF is a urea-based chemical reactant designed specifically for use in SCR systems to reduce NOx emissions.

Want to know more about Diesel Exhaust Fluid? Watch a recording of our DEF webinar.

DEF Informational Video

Usage Calculator
Calculate your annual DEF usage, click here.

Cummins Filtration offers various packaging sizes, including 1, 2.5, and 5 gallon bottles, 55 gallon drums, 275 gallon disposable totes, 330 gallon totes and bulk.

For all other regions, please contact your local Customer Assistance Center.
The raw materials used to produce DEF include natural gas, coal or other petroleum products. DEF is prepared by dissolving solid high purity urea in deionized water to create a 32.5% solution in water. DEF and similar urea-based products are widely used today for a variety of agricultural and industrial needs. Fleetguard DEF meets ISO22241 specifications for purity and composition, while being:
  • Non-toxic and non-polluting
  • Non-flammable
  • Stable and colorless
  • Non-hazardous
  • Does not require special handling
Cummins Filtration has recently released new information about DEF. Click here to read the press release.


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