Citrus scented high pH presoak concentrate developed for automatics, truck wash and tunnel applications. Excellent at removing oil, dirt, grease, bugs, and road film as a single step or as the second step in a low pH/high pH wash process. A specialized cleaning solution, often alkaline, used as the first step in a car wash to loosen and dissolve dirt, grime, and road film, preparing the vehicle's surface for the main wash.