If cracks square measure forming in your concrete, you'll stop the unfold and waterproof the positioning with a grout and epoxy injection. This can be done by injecting the chemicals into the cracks, or by drilling holes into the surface to insert the fabric. The grout is then pressure injected and it reacts with any remaining water to make a sealer. The gel or foam that results creates a water resistant barrier in situ of the previous crack. This technique is often applied to concrete piping, tanks, tunnels, and even foundational walls.