Product Details: The Permatex Radiator Cleaner is the perfect solution for removing scale and rust from radiators. This 1-quart cleaner is designed to quickly and effectively clean and unclog the tubes of radiators, making them look like new. It can be used in a variety of automotive applications, making it a great choice for any car enthusiast. With its powerful formula, it can easily remove scale and rust from radiators, leaving them looking and functioning like new. FleetPride is your First Click in Heavy Duty®.