Blue Sky® DEF
Vendor: Great Lakes Oil Private Label
Blue Sky® DEF (Diesel Exhaust Fluid) is one of the key elements of the SCR (Selective Catalytic Reduction) process. It is a nontoxic solution of 67.5% purified water and 32.5% urea. When injected into hot exhaust as a fine mist and passed over a catalyst, Blue Sky® DEF helps convert NOx (nitrogen oxide) into nitrogen gas and water vapor-- two clean and harmless components of the air we breathe. DEF is stable, colorless and odorless, and meets accepted international standards for purity and composition.