In PU injection grouting, specialized polyurethane grout is pressure-injected through drilled ports or packers into leaking cracks and honeycombed areas. The hydrophobic or hydrophilic resin expands upon contact with moisture, filling every gap completely and creating a durable, watertight barrier. Widely used for basement waterproofing, slab void filling, and negative-side leakage re... https://shakuraconstruction.sg/pu-injection-grouting-singapore/