PU injection grouting is an effective solution for stopping active water leaks and sealing cracks in concrete structures. This method involves injecting polyurethane resin into cracks where it expands and reacts with water to form a strong, watertight seal. PU injection grouting is widely used for basements, tunnels, roofs, and walls to prevent recurring leakage. https://shakuraconstruction.sg/services/pu-injection-grouting/