A sprayable, thicker, and stronger gel-based wheel cleaner that sprays easily and clings to the wheel surface for incredible cleaning of heavily soiled or neglected wheels. The thicker gel formula will cling to vertical surfaces better than the original P21S High Performance formula. Perfectly safe for all types of wheels when not used in direct sun or on a hot wheel. Spray on a cool, dry wheel, sponge evenly over the entire wheel surface to remove any drips or runs, allow to work for a few minutes and then rinse off all traces with water. Heavy accumulations of brake dust residue may require gentle brushing with a soft brush before rinsing and/or multiple cleanings. The Pump Spray Kit contains a 500mL bottle, sponge, spray head and an instruction booklet. Our favorite wheel cleaner for heavy accumulations of brake dust.