A coolant stop leak is a product designed to seal small leaks in a vehicle’s cooling system. It can be a temporary or permanent solution, depending on the severity of the leak. Coolant stop leak products typically contain a sealant that expands when it comes into contact with coolant, forming a seal around the leak. They can be added to the coolant reservoir or directly into the radiator.
Coolant stop leak products can be an effective way to stop small leaks and prevent further damage to the cooling system. However, it is important to note that they are not a permanent solution and should not be used to replace a proper repair. If a leak is severe, it is important to have it repaired by a qualified mechanic as soon as possible.