PU injection grouting is a top non-hacking waterproofing solution in Singapore for stopping active leaks in ceilings, walls, bathrooms, basements, and roofs. Polyurethane resin is injected under pressure into cracks or joints, expanding on contact with water to form a flexible, impermeable seal—perfect for humid tropical conditions. Ideal for HDB/condo ceiling drips from upstairs or s... https://shakuraconstruction.sg/services/pu-injection-grouting/