Radiator cleaner is a specialized product designed to remove limescale and contaminants in the Engine’s cooling system.Radiator cleaner effectively removes dust, grease, rust, scale and small cracks, restoring the radiator’s performance and extending its lifespan. Shake well before use. Add contents to the cooling systerm,start up the heater and drive the vehcle for more than 10 minutes.Contents will treat up for 12 litters.