Diesel Exhaust Fluid (DEF)

Brenntag Truck North America

DEF for diesel-powered vehicles with a SCR catalytic converter

As worldwide regulations for nitrogen oxide (NOx) emissions become stricter, a growing number of countries are beginning to make Diesel Exhaust Fluid mandatory for new diesel engines, including light and heavy-duty trucks, off-road agricultural and industrial equipment, and even new passenger cars.

DEF is a special urea solution that is used as a reducing agent in SCR (Selective Catalytic Reduction) technology. DEF is a high-purity 32.5% aqueous urea (ammonia) and 67.5% de-ionized water for specific use in SCR systems.

Diesel-powered vehicles with an SCR catalytic converter and an additional separate tank for DEF can convert their output of nitrogen oxides into neutral nitrogen and water, thus achieving a considerable reduction of their NOx emissions. We are the largest worldwide distributor of Diesel Exhaust Fluid.

Tractor working in field of wheat


Whether your machines are working in cornfields, orange groves or on cattle farms, they always need to be in top working condition. Purchase DEF from a dependable distributor with a high-quality product.

We take pride in the quality of our product and reliability of our supply chain and are dedicated to delivering you with exceptional product safely and on-time.

  Car driving on a road


Worldwide, many manufacturers use SCR systems in their passenger cars, which require DEF to comply with NOx reduction regulations. We advise you on the right technology for refilling and supply you with fluid of the highest quality.

  Bulldozer on a nice perspective


Between demolishing an old building and excavating a new one, you don't have time to worry about keeping your equipment running smoothly.

Your machines are the lifeblood of your business, and you can't afford to lose time - or money - on maintenance and expensive repairs. Our primary goal is to ensure the efficient operation of your equipment.



We have proudly serviced the marine market for almost 20 years, from drums and totes to full truckloads. We can provide a wide range of concentrations of both caustic soda and liquid urea directly to your vessel or shore site, thanks to our strategically placed locations across the globe.

Freight trucks


Your vehicle fleet is essential to your daily operations. If it's not operational due to poor maintenance, it directly affects your profits. Purchasing our quality products ensures reliability for your business.

Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF) is a non-toxic, high purity solution comprised of 32.5% urea and 67.5% de-ionized water. Using this fluid in diesel-powered vehicles (such as trucks, buses, and tractors) helps to reduce the amount of nitrogen oxides (NOx) emitted into the air by 90%.

DEF is not a fuel additive and must be filled into the dedicated Diesel Exhaust Fluid tank on your diesel vehicle. We have been providing Diesel Exhaust Fluid (DEF) solutions to customers, distributors, and dealerships in the North American trucking market since 2009.

With over 1,000,000 gallons of bulk Diesel Exhaust Fluid (DEF) storage across North America, we're ready to meet your needs!

Request a quote or buy DEF products online

semi truck 18 wheeler

DEF Services are tailored to your individual need

Our state-of-the-art facilities and laboratory support for Diesel Exhaust Fluid are unrivaled in the industry. We also own and operate DEF production facilities in several countries and have strong reliable partnerships with major urea producers worldwide.

We offer you DEF-related services that are tailored to your individual needs for shipping, packaging, and volume, as well as telemetry solutions to further ensure timely refills at our customers’ bulk sites. In addition, we offer customized equipment solutions that meet the highest industry standards.

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Download our product lists or browse products online to view our entire product offering.

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Contact us today to find out more about our product offerings, to ask us any questions, or to let us know how we can assist you with a specific application.