The Leak Sealer is a specialized product for repairing leaks in your spa, brought to you by Lo-Chlor. It is a concentrated formula that is very easy to use and provides effectiveness. The Leak Sealer is designed for use in situations where water loss does not exceed 1 inch per day in a 60,000-liter pool. With a dosage of 225ml for every 2000 liters, the difference in the leak will be immediate, although a second application may be needed.