Diesel Exhaust Fluid
Diesel Exhaust Fluid (DEF) is the operating fluid used in the SCR engine technology of new diesel trucks to chemically reduce nitrogen oxide emissions from the exhaust to near zero levels. Air1® DEF is a pure, aqueous solution of urea and water that is certified to meet API and ISO-22241 standards for purity and concentration. It is biodegradable, non-toxic, non-hazardous, non-flammable and non-explosive.
DEF is contained in a separate tank fitted to the vehicle. There is a DEF fuel gauge to indicate when the tank needs refilling. Air1® DEF is filled, delivered and dispensed with strict packaging integrity to ensure the purity of the liquid is uncompromised.