A radiator is a heat exchanger that transfers heat from the engine to the air. When a radiator develops a leak, it can cause the engine to overheat, which can lead to serious damage. Radiator stop leak is a product that can be added to the radiator to seal the leak and prevent further coolant loss. There are many different types of radiator stop leak products on the market, so it is important to choose one that is compatible with your vehicle and the type of leak you have.
Radiator stop leak products can be effective in sealing small leaks, but they are not a permanent solution. If the leak is large or if the radiator is severely damaged, it will need to be replaced. However, radiator stop leak products can be a useful temporary solution to prevent further damage and buy you some time until you can get your radiator repaired or replaced.