PU injection grouting is Singapore's go-to non-destructive fix for persistent water leaks in concrete—injecting hydrophobic or hydrophilic polyurethane to create expanding foam barriers that halt seepage from cracks, cold joints, or porous surfaces. Suited for ceiling repairs (from upstairs bathrooms), basement damp-proofing, or roof-related issues without tile removal. Many contracto... https://shakuraconstruction.sg/services/pu-injection-grouting/