PU injection grouting excels at stopping active water leaks in damp or wet concrete cracks. Hydrophobic or hydrophilic polyurethane resin is injected at high or low pressure, where it reacts with water to form a resilient foam plug that blocks infiltration completely. The cured grout remains flexible, allowing for minor structural shifts without breaking the seal. Perfect for basement... https://shakuraconstruction.sg/pu-injection-grouting-singapore/