In addition to the basic wheel kit, the intermediate wheel kit includes P21S Gel Wheel Cleaner from Germany. This safe and effective cleaner is great for the deep-cleaning of the wheels once a month. P21S Gel Wheel Cleaner is pH balanced and safe for all wheel types. Sonax Tire Gel can be used as a tire conditioner and will impart a clean and shiny look to the tires. Its protection and look lasts for weeks.