For years an excellent underwater ice rink liner patch has been on our list to find. We have now discovered one that fits our criteria for excellent.
Simple to use as a tube of toothpaste. Clean the area around the puncture and squeeze out the amount needed into the troubled area below water level if necessary. Feather the edges with moist finger and within a short time it will have cured. Very impressive. It’s white in color and is perfect for the bottom of your rink as an underwater ice rink puncture patch.