Make sure your cooling system is clean. Stop Leak stops and prevents leaks and seepage in radiators, heater cores, blocks, cylinder heads, freeze plugs and gaskets. Will not clog or damage cooling systems. Works with all types of anti-freeze/coolant.
- Stops radiator leaks instantly
- Prevents new leaks from developing
- Works in both water and anti-freeze solutions
- Will not harm metal, rubber hoses, gaskets, or any part of cooling system
- For use on cars, small trucks or tractors