Stops water cooler leaks from small cracks & holes.
MASTER Stop Leak creates a metal film that acts immediately and seals any small cracks or holes.
It also protects the entire cooling circuit from corrosion and lubricates the water pumps.
Does not affect other mechanical or rubber parts. Fully compatible with all types of antifreeze.
- Also suitable for radiators, cylinder heads & gaskets.
- Economical solution
- Suitable for all types of refrigerators.
- Immediate & effective action






