SCR Solutions is New Zealand's leading manufacturer and distributor of diesel exhaust (DEF) emissions reduction solution, AdBlue.

DEF is an exhaust system additive and scrubbing agent that reduces nitric oxide (NOX) emissions in modern diesel engines. GoClear is used by lean burn engines which are equipped with selective catalytic reduction (SCR).

SCR has become the preferred emissions reduction technology for nearly all diesel vehicles including trucks, buses, cars and off highway equipment required to adhere to global emission standards. Euro 4 and Euro 5 emission standards can be met with either the older process of exhaust gas circulation (EGR) or SCR technology, while Euro 6 standards requires the use of SCR to achieve the lower limits of NOX allowable.