A radiator stop leak is a substance that is used to seal small leaks in a radiator. It is typically made of a rubber or latex compound that swells when it comes into contact with water, forming a seal that stops the leak. Radiator stop leaks can be temporary or permanent, and they can be used to repair leaks in both metal and plastic radiators.
Radiator stop leaks are an important tool for keeping your car running properly. A small leak in a radiator can lead to overheating, which can damage your engine. Radiator stop leaks can help to prevent this by sealing the leak and preventing coolant from escaping. Radiator stop leaks can also help to improve the performance of your cooling system by reducing the amount of air that is able to enter the system.