Diesel Exhaust Fluid

DEF is a crucial product for many industries, and we’re here to help your business use it safely and effectively.

When it comes to providing valuable Diesel Exhaust Fluid (DEF) solutions, Tyree™ goes a step further than getting the best product in your hands: we also offer turn-key DEF solutions for storage, dispensation, and onsite support. DEF is a crucial product for many industries, and we’re here to help your business use it safely and effectively. 

DEF is a newer product required by many heavy-duty trucks, pickups, SUVs, and vans delivered after January 2010. DEF is used to destroy harmful emissions in the exhaust and meet the EPA’s latest strict environmental standards.

DEF is a 32.5% solution of high-purity urea in de-mineralized water that is used with the Selective Catalytic Reduction system (SCR) to reduce emissions of nitrogen oxides (NOx) from the exhaust systems of diesel vehicles into nitrogen, water, and carbon dioxide (CO2).  DEF is a clear non-hazardous liquid that is neither a fuel, nor a fuel additive, and needs to be dispensed into a DEF storage tank that is on your diesel-powered vehicle or power generator system. 

Tyree offers turn-key DEF solutions that go beyond just the product. We offer customers industry-leading, DEF-approved storage and dispensing options, plus onsite training and technical support. Tyree will ensure your company is using DEF with confidence while providing you with the most competitive pricing and the highest standards in DEF supply and service in the Pacific Northwest.

Cirrus DEF is available in:

  • 1-gallon jugs
  • 2.5-gallon jugs
  • 55-gallon drums
  • 275 or 330-gallon totes 
  • Bulk

DEF “at the pump” is now available at all of our Tyree Cardlock Sites as well as locations throughout the CFN Fuelman and Pacific Pride networks.