A premium Prestone antifreeze/coolant change begins with Prestone Super Radiator Flush. Helps remove rust deposits and oily residue in an easy, one-step process. Premium formulation helps maximize cooling system efficiency. Super Radiator Flush maximizes cooling system efficiency by helping to flush out harmful rust deposits, grease, and oily residue. It uses a strong chelating compound to bind rust and other corrosion deposits to help flush them out of the system prior to installing new antifreeze. Detergents emulsify oily residues. Super Radiator Flush is intended for cars with heavier build ups of rust and radiator and heater core deposits.