PU injection grouting is the most effective, non-invasive method for stopping active water leaks in concrete structures. This process involves injecting high-pressure polyurethane resin into cracks, which expands upon contact with moisture to create a tight, flexible seal. It is perfect for fixing leaks in HDB bathrooms, basements, and balconies without the need for expensive hacking.... https://shakuraconstruction.sg/services/pu-injection-grouting/