4:1 Concentrate

A highly potent and concentrated acid based formula that instantly dissolves brake dust buildup and also brightens aluminum wheels.  Silverado is a powerful cleaner that removes surface rust, and dries without spotting.  Be aware of the wheel finish you are cleaning: Not recommended for clearcoated wheels or certain softer alloys of aluminum/magnesium wheels.  Also effective for cleaning and brightening truck bodies: Brush on a section at a time, and flush with water immediately. For cleaning chrome or aluminum wheels, use straight for the worst jobs and dilute with water 4:1 for most applications.