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Bulk DEF (Diesel Exhaust Fluid)

ToughAG.com is your premiere source for DEF! Bulk DEF Available in large or small quantities at only $1.69 per gallon! Our friendly team can provide DEF for your farm, auto dealership, truck fleet, repair shop or garage at the most competitive price in the region.


Call Today! 

Call today to order or for a free quote. 

Chad – 605-336-6287
Jeff – 701-361-1909

Or learn more in-store at your local Browns Valley Hardware Hank! 


What is DEF?

Diesel exhaust fluid, or DEF, is a special urea fluid used to reduce pollutants from diesel engines. Diesel exhaust fluid not only helps reduce harmful emissions, it also helps diesel engines product more power. DEF is a necessary fluid for all Agri diesel equipment such as most modern tractors as well as semi-trucks or tractor trailers. 

DEF is sprayed into the exhaust stream to react with nitric oxide and nitrogen dioxide, the harmful gases produced by diesel engines. The diesel exhaust fluid converts the harmful emissions into nitrogen and water that are harmless to the environment.

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