Gel Wheel Cleaner from P21S - Remove corrosive brake dust from alloy wheels with this safe formula. Guaranteed not to attack any road wheel, braking system or other automotive surface. Spray on - allow to stand up to 2 hrs., wipe stubborn spots with a sponge & water rinse. Gel clings to vertical surfaces. 500ml (16.9fl.oz) Set with Sprayer & Sponge.