Easy to build up and difficult to wash off, brake dust has been the bane of beautiful, shiny wheels since the invention of disc brakes|Within days of washing, your wheels can be covered in dust again|It doesnt have to be that way any more with Armor All Shield Brake Dust Repellent! Just spray Armor All Shield Brake Dust Repellent on clean, dry wheels|Once dry, it creates an invisible shield|Your wheels will look clean from wash to wash and cleaning will be easier