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BuildGrout PU Rigid

A two-component, rigid polyurethane injection resin for structural crack sealing and soil consolidation. BuildGrout PU Rigid produces a high-strength rigid foam or solid mass (depending on water content) and is used where structural load transfer across cracks is required.

Packaging

10 kg kit (5 kg + 5 kg), 44 kg kit (22 kg + 22 kg)

Coverage

Depends on void volume and required foam density

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Features

  • Two-component system for controlled reaction and foam density
  • High compressive strength rigid foam (> 4 MPa at density 200 kg/m³)
  • Excellent soil penetration for ground stabilization
  • Controllable reaction time (15 seconds to 5 minutes via catalyst)
  • Good adhesion to concrete, masonry, and soil particles
  • Resistant to hydrolysis and microbiological degradation

Technical Specifications

ViscosityComponent A: 200 mPa·s, Component B: 300 mPa·s
Mixing Ratio1 : 1 by volume
Reaction Time15 seconds to 5 minutes (adjustable)
Expansion Ratio1 – 10 times (adjustable)
Closed Cell Content> 90%
Service Temperature-40 °C to +100 °C
Compressive Strength (solid mass)> 15 MPa
Compressive Strength (foam at 200 kg/m³)> 4 MPa

Application Areas

Structural crack injection requiring load transferSoil stabilization and ground consolidationVoid filling behind tunnel liningsLifting and levelling of sunken concrete slabsStabilization of loose gravel and sandy soilsSealing annular gaps around pipes and tunnels

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