Sakrete Leak Stopper is hydraulic cement designed to stop active water leaks in concrete and masonry. It will also stop leaks underwater. A mixture of sand, cement and special additives designed to stop the flow of water through breaks in concrete and masonry. It will even stop leaks underwater and under pressure.

• Instant setting hydraulic cement.
• Great for leaks in pools or stopping other active leaks in concrete and masonry.
• For all kinds of instant repairs to concrete and masonry. No need for forms or braces.
• Available in white.
• Just add water.