Valet-Pro Clay Bar Medium is an effective clay bar for removing moderate amounts of paint contaminants. Removes tar spots, fall out, bonded traffic film and tree sap. As the bar glides over the paint surface bonded contaminates stick to the bar and are gently removed from the paint work. If your paint work feels rough after washing, try a contamination removal bar and feel the difference. Can be used with water, however we recommend using an effective clay lubricant.