Ensure that your vehicle is running its best with this Prestone Radiator Flush and Cleaner Additive. It is a two-in-one formula for light flushing or heavy-duty cleaning that's made for use in cooling systems. This Prestone radiator additive is made to help prevent overheating, which is the number-one cause of engine failure. It comes in a pack of one. This Prestone flush and cleaner will help break up rust and contaminants to make your engine run cooler overall. It's recommended to run the car with the product for several days for best results. For easy maintenance without going to the shop, adding this supplement will get your automobile's engine back in shape.