Download Product Data
Mountain Grout Gel Foam is a hydrophilic polyurethane injection grout designed to stop active water leaks through cracks and joints in concrete. It reacts with water inside the leak path, expanding into a flexible foam or gel to seal areas that remain consistently wet.
Where it works best
Choose Gel Foam for water ingress in continuously damp concrete structures, including dams, tunnels, underground vaults and lift pits. It is particularly useful where the leaking crack already contains water: moisture triggers the grout's reaction and is important to the resulting hydrophilic seal.
How it works
Gel Foam can be injected as a single-component resin into wet cracks, or used with water in a two-component injection setup. Depending on the amount of water encountered, it forms a foam or gel that fills the leak path. The formulation is solvent-free and TDI-free.
Choosing the right Mountain Grout
Gel Foam is the moisture-dependent option for persistently wet areas. Where a crack or joint regularly dries out, consider a hydrophobic grade such as Mountain Grout Flexible or Mountain Grout Ultra instead.
Key considerations
- The water-reactive formulation requires moisture to initiate its reaction.
- Continued moisture exposure is important to the performance of the hydrophilic seal.
- Injection method, water conditions and reaction behaviour should be matched to the job by an experienced installer.
When should Gel Foam be chosen instead of a hydrophobic Mountain Grout?
Choose Gel Foam where the crack or joint remains continuously wet. Its hydrophilic seal relies on ongoing moisture; for wet/dry cycling, use a suitable hydrophobic grout instead.
- Wet concrete cracks
- Concrete joints with continuous moisture exposure
- Water-bearing voids in concrete structures
Mountain Grout Gel Foam Physical Properties
| Property | Value |
|---|---|
| Base Chemistry | Hydrophilic Polyurethane |
| Curing System | Single Component |
| Viscosity | 650 cps |
| Elongation | 400% |
| Expansion Ratio | Up to 25x |
| VOC Content | 0 |
| Solid Content | 100% |
| Specific Gravity | 1.07 |
| Flash Point | >121ºC |
| Density | 80kg/m³ |
| Tensile Strength | 170 psi |