There's a recirculating fountain in my garden. The well that holds the
water is cement, about 4' in diameter and 1' deep.
The well leaks.
How can I seal the well to stop the leak? Is there something I can
paint on (swimming pool paint, perhaps)? Or is there something I can
trowel on - a thin coat of a cement product?
The cement surfaces of the well aren't visible, so I don't have to limit
myself to attractive solutions.