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Price: $3.49/Gal
$191.95/Drum

Available sizes:

  • 2.5 gallon jugs, case of 2 jugs
  • 55 gallon drum


Diesel exhaust fluid (DEF) is a liquid used to reduce the amount of air pollution created by a diesel engine. It is an aqueous solution made with 32.5% urea and 67.5% deionized water that lowers the concentration of nitrogen oxides from the exhaust produced by diesel engines.



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