PU Injection Grouting is an effective waterproofing method used to stop water leakage through cracks, joints, and gaps in concrete structures. Polyurethane grout is injected under controlled pressure into the affected areas, where it expands and fills cavities, creating a flexible and water-resistant seal. This technique is suitable for basements, underground structures, concrete slabs, walls, tunnels, water tanks, and foundations. PU injection grouting can effectively address active water seepage and help prevent further moisture damage.