Have a pond that is 12 inches deep and 3' x 4' wide. Wanted to coat it so it would not leak. Bought 3 gallons of Flex Seal from Lowes at a price of almost $ 300.00. Coated it 8 times and let dry for 24 hrs. each time. Pond still drains down. I feel that this was an extremely wast of money? You make your product look so bullet proof on TV but in real time not so good. I'm not only very disappointed in out all that money. Thanks.