P21S did it again. Probably one of the most powerful automotive cleaning products on the market today that still offers the famous P21S surface safety. This formula is excellent for removing diesel soot and other tough stains that ordinary car wash products just can’t seem to cut. Got wax or grime built-up on your paintwork? No problem. The P21S This stuff’s got the horsepower to cut the mustard. Where does all the power come from? The P21S detergent formula, plus the addition of a powerful citrus solvent add up to an unmatched cleaning power.