Marlig Fix-A-Leak is a blended concentrated liquid material designed to permanently seal small leaks & holes up to 1/8" diameter swimming pool plumbing and Jacuzzi's - quickly & inexpensively. Safe & easy to use, Marlig Fix-A-Leak has been thoroughly field-tested under various weather conditions, and has proven to be safe & extremely effective. Marlig Fix-A-Leak is also great for preventative maintenance, to coat surfaces and cut down on formation of rust & corrosion. Dosage is 300ml per 5,000 litres for minor leaks; use a second bottle for larger leaks. Treatment can be repeated if necessary.