BOSLAI Solvent-Based Polyurethane Injection Grout (PU injection grout / PU inject form) is a single-component grouting material that, when injected into concrete, reacts chemically with water. Due to slow expansion and sustained pressure, the grouting material penetrates fine cracks, rapidly expands and cures, achieving a complete water-stop effect. It is one of the most effective grouting materials available today. To ensure sufficient time for smooth operation, this product expands to its maximum state in about 20 minutes at room temperature. If faster speed is required, an accelerator can be added, which can be purchased separately from the manufacturer.
Single-component / High Forming Rate / Excellent penetration / no shrinkage
Where Can BOSLAI Solvent-Based Polyurethane Injection Grout Be Applied?
1. Sealing leaks in cracks, expansion joints, construction joints, and structural joints of various buildings and underground concrete projects.
2.Wall protection, leak sealing, and reinforcement in geological drilling projects.
3.Dam grouting in water conservancy and hydropower projects; tunnel crack sealing; anti-seepage and reinforcement of concrete cracks in dam structures.
4.Stabilization and reinforcement of high-rise buildings, railway foundations, and high-grade highway roadbeds.
5.Water sealing in mining tunnels and reinforcement of fractured layers such as roofs in coal mining or other mining operations.
6.Reinforcement of bridge foundations and crack repair in bridge structures.
7.Reinforcement of deformed buildings; crack repair and anti-subsidence measures in concrete structures such as water towers and pools.
What Are the Packaging Options, Forming Rates, and Warranty?
| Specification: | 7kg / pail, 10kg/pail, 20kg/pail |
| Appearance: | Single component, brown liquid. |
| Foaming ratio | Max. 30 times |
| Shelf Life: | 1 Year |
What Are the Technical Specifications?
| Item | Data |
| Appearance | Uniform liquid, no impurities, no separation. |
| Density, g/cm³ | 1.15 |
| Viscosity, mPa·s | 186 |
| Non-volatile content, % | 86 |
| Foaming rate, % | 2830 |
| Compressive strength, MPa | 6 |
TDS-Solvent-Based Polyurethane Injection Grout
What are the key features and advantages of BOSLAI PU 668 Injection Grout?
- Rapid Reaction: Reacts quickly with water, expanding and solidifying.
- High expansion rate: This product features a high expansion rate and is non-shrinking, capable of forming solid foam material up to 30 times its original volume, thereby further filling voids and providing waterproofing and leak sealing.
- Strong Adhesion: Provides strong adhesion to substrates and excellent chemical resistance.
- Easy to Operate: Suitable for single-liquid high-pressure injection pumps and other equipment, simple to operate and ideal for quick repairs.
- Strong permeability: Low viscosity, large penetration radius, capable of penetrating fine cracks and pores, with strong adhesion to the substrate, ensuring long-lasting repair effects.
Customization Service
Customization is available for product forming rate, packaging design, and package sizes.
FAQ
Polyurethane Injection Grout for Tunnel, Mining, and Dam Projects
Known by many names — PU injection grout, polyurethane foam grout, chemical grouting material, or crack injection resin — solvent-based polyurethane injection grout is engineered for high-pressure water stop applications. This polyurethane grouting material expands up to 30 times on contact with water, penetrating fine cracks with low viscosity (186 mPa·s) and curing into a rigid, non-shrinking foam. It is widely specified for tunnel sealing, mining tunnel reinforcement, dam anti-seepage, basement crack repair, and bridge foundation stabilization.
Your PU Grout Supplier and Injection Grout Manufacturer
As a dedicated injection grout manufacturer and exporter, BOSLAI provides factory-direct pricing, full OEM customization, and export documentation including MSDS and dangerous goods classification. We supply PU injection grout in 7kg, 10kg, and 20kg pails with flexible MOQ for distributors and importers. Whether you call it polyurethane injection resin, PU foam grout, or water stop grout — we are your reliable PU grout supplier with shipments across Southeast Asia, the Middle East, Africa, and Europe. Request a free sample or download our TDS today.
How to apply PU grout? How to inject the Polyurethane Injection Grout？
Please click and see this article to see the standard process of applying it：
Polyurethane Injection Grouting: Complete Procedure Guide
