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As new environmental regulations are implemented around the globe, diesel emission liquids have become more important than ever in the goal to meet new standards. Cummins Filtration offers several products that support customers in meeting these regulations. 

DEF is a urea-based chemical reactant designed specifically for use in SCR systems to reduce NOx emissions.


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


  • New Diesel Exhaust Fluid (DEF) Program for Fleetguard in North America