PU grout Injection for water leaking PU grout injection is an effective solution for stopping water leakage in concrete walls, ceilings, basements, and structures. This method seals cracks by injecting polyurethane material that expands to block water flow and prevent further damage. Our service ensures long-lasting waterproofing, structural protection, and fast leak repair for residential and commercial buildings. Reliable solution for active water seepage problems.