When used as directed, Forté Radiator Stop Leak & Cooling System Conditioner will not cause any blockage of the radiator cores or heater matrix; nor will it harm any cooling system components. Forté Radiator Stop Leak & Cooling System Conditioner is a unique blend of natural fibres and surtace active agents which combine to plug hairline cracks and pinholes in the radiators and cooling systems of motor vehicles.
