Waterproofing Resins & Coatings
AquaBlock PU-300 Foaming Resin
In StockSingle-component hydrophobic polyurethane grout that reacts with water to form a tough closed-cell foam, sealing gushing leaks in concrete and masonry.
AquaBlock PU-300 is built for the toughest active-leak situations, where water is moving through a crack and conventional coatings simply wash away. On contact with moisture it foams rapidly, driving deep into the crack and curing into a resilient, closed-cell mass that holds its volume.
Used with mechanical injection packers and a high-pressure pump, AquaBlock PU-300 delivers a permanent, flexible seal that tolerates minor structural movement without re-cracking.
Key Features
- Reacts on contact with water to expand and fill voids
- Hydrophobic closed-cell foam with stable cured volume
- Strong adhesion to damp and wet substrates
- Penetrates fine cracks before foaming
- Suitable for negative-side (back-of-wall) sealing
Applications
- Sealing active water leaks in basements and tunnels
- Stabilising loose soil around underground structures
- Treating construction joints and pipe penetrations
- Curtain injection behind retaining walls
Technical Specifications
| Base | Single-component polyurethane |
|---|---|
| Appearance | Amber liquid |
| Water reaction | Hydrophobic |
| Density | 1.16 g/ml |
| Viscosity (25°C) | 120–190 mPa·s |
| Free-rise expansion | up to ~25× |
| Tack-free time | ≈ 90 s (with catalyst) |
| Packaging | 5 kg / 20 kg pails |
| Shelf life | 12 months, sealed |
Free Samples Available
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