PU Injection Machine & Packers — Electric Polyurethane Crack Injection System

The PU Injection Machine is an electric-powered, single-component pump system designed to inject polyurethane resin into cracks, joints, and voids in concrete structures under controlled pressure. Supplied as a complete system with the pump unit, high-pressure hose, pressure gauge, and injection packers, it enables fast, precise waterproofing repair without excavation or demolition.

Once injected, the PU resin reacts with moisture in the crack — expanding up to 40 times its original volume — to form a tough, flexible, and permanently watertight foam that seals the crack from within, even against active water flow.

• Electric-powered piston pump (1,300W) with high-pressure output up to 15,000 PSI — penetrates fine cracks as narrow as 0.1 mm
• Integrated hopper, inline pressure gauge, and pressure relief valve for precise, safe, and controlled injection at all times
• Compatible with single-component PU foam, hydrophilic PU gel, hydrophobic PU resin, and epoxy injection materials
• Injection packers (hammer-in and mechanical types) — installed in drilled holes at 45° to the crack to act as entry ports for the resin
• Water-reactive PU resin expands 20–40× on contact with moisture, filling all voids and creating a flexible, watertight seal
• Stops active water leaks in real time — no need to wait for the structure to dry before injection
• Easy to flush and clean after use — solvent or acetone flush through hopper clears residual resin from pump and hose