Injection Grouting

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PU injection system means Polyurethane Injection System, which is a widely used method for
waterproofing, crack sealing, and structural repair in concrete and masonry structures.

PU Injection System

PU (Polyurethane) Injection is a pressure grouting technique where liquid polyurethane resin is injected into cracks, joints, or voids in concrete.
When injected, the PU resin reacts with water or moisture and expands (foam type) or forms a flexible/semi-rigid solid (resin type).
This seals the cracks, fills voids, and blocks water leakage permanently.

Applications

Basement waterproofing
Tunnel and metro projects
Bridge deck joints and cracks
Water tanks and reservoirs
Sewage treatment plants
Retaining walls and foundations

Advantages

Quick and effective for stopping active water leaks.
Can be applied even in damp or water-flowing conditions.
Expands and fills even the smallest cracks.
Long-lasting and flexible (accommodates structural movement).
Minimal surface disturbance (no need for heavy demolition)

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