Stops and prevents leaks in the cooling system.
Bardahl Radiator Stop Leak remains dormant in the coolant until it finds a leak. Then its fibrous filler joins with its sealant to form a plastic seal, stopping the leak or seep. The fiber hooks on the leak edges, forming a mat; the sealant penetrates the mat and hardens as it contacts the air. this seal is tough enough to withstand the pressure and the temperatures in the system and pliable enough to survive jolts and vibrations. Because Bardahl Cooling System Stop Leak doesn’t work until it’s needed its use now protects against future leaks. Do not add more than prescribed, this may have an adverse effect.