For structural integrity, PU injection grouting is the industry gold standard. This method involves injecting hydrophobic or hydrophilic polyurethane into concrete joints and cracks. Once inside, the chemical reaction creates a flexible, closed-cell foam that provides a 100% watertight seal. It is ideal for repairing expansion joints, basement walls, and water tanks where traditional ... https://shakuraconstruction.sg/services/pu-injection-grouting/