What is AdBlue®?

“AdBlue® is the registered trademark name for an Aqueous Urea Solution (AUS 32) or Diesel Exhaust Fluid (DEF). It’s a non-toxic, odourless and colourless liquid consisting of 32.5% high-purity urea and 67.5% deionised water. It is not a fuel additive, but a separate fluid used in the exhaust stage of diesel engine systems.”