Prep Pro 1 is a highly effective, noncorrosive low pH presoak for use in both friction & touch-free cleaning environments. Prep Pro 1 is recommended for use as the 1st step application in a 2 step cleaning process & is compatible with all Clean Touch alkaline presoaks. It is designed to safely & effectively remove all inorganic particulates from the vehicle surface including glass & chrome. Works well as a low pH CTA application – wheel brightener. comes as (1) 15-gallon container.