GTechniq - Car Care Products - C5 Wheel Armour - 15 ml Description Independently proven to outlast other wheel coatings, C5 uses a unique chemical bond to become the functional surface of your rims making them dirt and brake dust repellent as well as being much easier to clean. A single application lasts up to one year. Gtechniq C5 Wheel Armor provides an incredibly durable, long-lasting coating that blocks out all contamination. Wheels coated with C5 are simple to clean and they tend to stay cleaner on their own. Car shampoo or a non-acidic degreaser is all you need for regular wheel cleaning.