What is DEF?
Diesel Exhaust Fluid (DEF) is a very pure, aqueous, solution of urea which meets the automotive industry specification defined by ISO 22241. It is a clear liquid similar in appearance to water.

DEF is safe to handle and use; it is not explosive, flammable, toxic, or subject to any hazardous product regulations. The product can be purchased in 2.5 Gallon Cans, 55 gallon Drums, 275 gallon IntermediateBulk Containers (IBCs) and can also be supplied in bulk by road tanker.

Storage facilities can be tailored to suit customer needs allowing for the usual precautions to prevent spillage into nearby drains and water courses. DEF has an official shelf life of 12 months if the stipulated storage conditions are observed. However, DEF that has been stored for longer than 12 months may still be perfectly usable and simply needs to be analyzed to check that it still conforms to the DEF specification.

Air1® is a unique concept developed by Yara to ensure a secure supply of the high-quality DEF needed in your Selective Catalytic Reduction (SCR) system.

Air1®is increasingly available at public filling stations, truckstops, automatic filling stations, home depots, chemical distribution depots and most major truck manufacturers' dealerships.