PU Grouting

PU (Polyurethane) grouting is a chemical injection waterproofing technique used to seal cracks, joints, and leakage paths in concrete and masonry structures. In this process, polyurethane resin is injected under controlled pressure into leak-prone areas.

When the PU resin comes into contact with water, it reacts and expands, forming a dense, flexible foam that fills cracks, voids, and micro-gaps inside the structure. This reaction blocks the flow of water instantly and creates a permanent waterproof barrier within the concrete.