This diesel exhaust fluid is a pure, aqueous solution of urea and water that is used in new diesel-powered engines with selective catalytic reduction technology. The fluid reduces nitrogen oxide gases into harmless nitrogen and water vapour. The diesel exhaust fluid is non-hazardous, non-toxic, and non-flammable. It has a freezing point of -11 Degrees C and has a shelf life of 12 months. This product comes in a 3.78-litre bottle.