Prevents expensive repairs to AdBlue system components by preventing crystallization and keeping the SCR system clean. Prevents crystals from forming on the components of AdBlue system. It has a cleaning effect on all components of the SCR system and easily melts crystalisation from the AdBlue tank, pump and injector. Improve SCR/AdBlue system efficiency. Prevents expensive repairs to the SCR/AdBlue system. Please avoid errors and stop times due to AdBlue crystalization. Extend the life of your AdBlue system components. How to use: Only refill in AdBlue container, use a 125 ml 15 L bottle of AdBlue for each refill of AdBlue. Contains 1,2-benzisothiazol-3(2H)-one. May cause an allergic reaction.