HYDRAULIC CEMENT 4LB

A portland cement-based, quick set hydraulic cement for concrete and masonry. A dry powder mixed with water, sets in 3 to 5 minutes. It expands as it sets to lock into place even under constant water pressure. Instantly stops running water or seepage through holes or cracks in concrete or masonry walls, swimming pools, sea walls, water storage facilities, tunnels, fountains, water channels, drains, ponds and piers. Stops leaks instantly. Can be used underwater. Expands as it hardens. Permanent. Non-shrinking.