Blue Def Diesel Exhaust Fluid 2.5 Gallons



  • Diesel Exhaust Fluid is sprayed into the diesel exhaust streams of diesel engines to lower the concentration of nitrogen oxide, NOx, in emissions
  • Engineered for use in Selective Catalytic Reduction (SCR) systems on diesel engines, BlueDEF diesel exhaust fluid is comprised of a high-purity synthetic urea and deionized water mixture that improves emissions and fuel economy

Out of Stock
Contact us for availability. Pricing subject to change.


  • When injected into the exhaust stream with a specialized dosing module, BlueDEF’s water vaporzies, leaving ammonia molecules en route to the catalytic converter; once there, it converts NOx molecules into harmless nitrogen and water vapor – making for cleaner emissions
  • To ensure Selective Catalytic Reduction (SCR) performance, diesel exhaust fluids must adhere to the ISO 22241 standards
  • Diesel Exhaust Fluid (DEF) is made with 32.5% urea, (NH2)2CO, and 67.5% deionized water. Diesel Exhaust Fluid (DEF) is non-toxic and safe to handle, but it can corrode some metals, so it must be stored and transported carefully