Hydrophobic, tough polyurethane grout for curtain grouting and void filling


InjectProECO-CombiGrout is a slightly flexible, tough, closed cell, polyurethane injection grout designed for grouting into voids and cracks. When it comes in contact with water, the grout expands and quickly cures to a tough, flexible, closed-cell polyurethane foam that is generally unaffected by common corrosive environments and is not subject to shrinkage due to wet/dry cycles. InjectProECO grouts are all environmentally friendly and formulated without harmful phthalates or VOC’s.

The system is comprised of an “A” component (base resin) and a “B” component (accelerator). The “B” component is used by the applicator to adjust the set times for various job site specific conditions.

Typical Applications:

  • Typical applications include filling voids and sealing cracks with differential movement


  • Zero VOC’s - meets LEED criteria
  • 100% solids, non-flammable, non-toxic permanent seal
  • Hydrophobic - can be used in wet and dry environments
  • Accelerator and resin stable to -40°F.
  • Expansion up to 20 times (free foam)
  • Flexible and tough foam
  • Pumped as a single component
  • Adjustable reaction times
  • Non-hazardous shipping

CSI Divisions:

  • Tunnel Grouting (31 73 00)
  • Division 3 - Concrete (03 00 00)
  • Injection Grouting (03 64 00)
Item number
Quick Product Access
Quick Division Access
Newsletteropt in