BOSLAI Water-Based Polyurethane Injection Grout (Elastic PU grout gel) is a single-component polyurethane injection grout supplied as a light yellow liquid. Unlike rigid foam systems, this water-based polyurethane injection grout disperses, emulsifies, and foams rapidly on contact with water — forming an impermeable elastic PU gel that retains permanent flexibility. As an eco-friendly water-based formulation, it is non-toxic, harmless, and non-polluting, making it safe for potable water structures, indoor wet areas, and enclosed job sites. Our PU injection grout delivers deep penetration into fine cracks. Secondary penetration via CO₂ release drives the grout into hairline voids, curing into a permanently elastic seal ideal for wet, dynamic, and flowing-water environments.
Single-component / Fast gelation / Excellent penetration / Eco-friendly
APPLICATION RANGE
BOSLAI Water-Based Polyurethane Injection Grout is suitable for repairing leakage and wet cracks in concrete components such as in basements, subway tunnels, dams, and brick structures. It is also applicable for indoor moisture-proofing projects in areas like bathrooms and kitchens, as well as for waterproofing joints in utility tunnels and repairing fine cracks in roofs of civil buildings. It is effective for leak-stopping in dynamic water environments, such as seepage caused by fluctuations in the groundwater table. The product is particularly effective in areas with visible seepage or active leakage, as it requires contact with free water to initiate its reaction.
PACKAGING & COVERAGE
| Specification: | 7kg / pail, 10kg/pail, 20kg/pail |
| Appearance: | Single component, yellow transparent liquid |
| Water uptake ratio: | maximum 20 times |
| Gel Curing Time: | 16 seconds |
| Shelf Life: | 1 Year |
TECHNICAL DATA
| Item | Data |
| Appearance | Uniform liquid, no impurities, no separation. |
| Density, g/cm³ | 1.060 |
| Viscosity, mPa·s | 686 |
| Gel curing time, s | 16 |
| Water absorption expansion rate, % | 72 |
| Water retention (10 times water), s | 24 |
| Non-volatile content, % | 79 |
DOWNLOAD TDS
TDS-Water-Based Polyurethane Injection Grout.pdf
ADVANTAGES
BOSLAI Water-Based PU Injection Grout offers 5 core advantages:
- Elastic PU Gel Seal: Reacts with water to form an impermeable, flexible PU gel — not a rigid foam — maintaining permanent elasticity for dynamic and moving cracks.
- Eco-Friendly Water-Based Formula: Non-toxic, harmless, non-polluting polyurethane injection grout formulation, safe for potable water structures, indoor wet areas, and enclosed job sites.
- Strong Secondary Penetration: CO₂ release during reaction drives the grout deeper into fine voids, ensuring complete sealing in hairline cracks that surface grouts cannot reach.
- Low-Temperature Resistance: Maintains elasticity and water-stopping performance down to -20°C, suitable for cold-storage facilities and winter construction.
- Adjustable Foaming & Viscosity: The single-component polyurethane injection grout allows customizable 8x or 16x foaming ratio, viscosity, and curing speed for project-specific leak-sealing requirements.
Customization Service
Customization is available for quality grade, packaging design and package sizes.
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FAQ
Q: What is water-based polyurethane injection grout?
Water-based polyurethane injection grout is a single-component polyurethane injection grout supplied as a yellow liquid that disperses, emulsifies, and foams upon contact with water to form an impermeable, elastic PU gel rather than a rigid foam. It cures into a permanently elastic seal with -20°C low-temperature resistance, excellent water resistance, and secondary penetration via CO₂ release — making it the preferred polyurethane grout manufacturer choice for wet, dynamic, and flowing-water crack repair.
Q: How does water-based PU grout differ from solvent-based PU grout?
Solvent-based PU grout forms a rigid foam with up to 30× expansion for high-pressure, fast water-stopping in active leaks. Water-based PU grout instead forms a flexible, elastic PU gel that retains permanent elasticity — ideal for dynamic cracks, wet substrates, and eco-sensitive applications such as potable water tanks, indoor wet rooms, and drinking water infrastructure where a non-toxic, water-based formulation is mandatory. As a polyurethane injection grout manufacturer, BOSLAI supplies both grades side by side.
Q: How fast does water-based polyurethane injection grout cure?
The standard gel curing time is ≤150 seconds, with a tested result of 16 seconds — extremely rapid initial set. Full strength development and on-site inspection can proceed after 72 hours. Ambient temperature above 0°C is required; lower temperatures slow the chemical reaction. The 8x or 16x foaming ratio is selected based on crack width and project requirements.
Q: Where is water-based PU injection grout best used?
This PU injection grout is best used in basements, subway tunnels, dams, brick structures, bathrooms, kitchens, and utility tunnels — anywhere wet cracks, dynamic water seepage, or groundwater fluctuation exists. Because it forms an elastic PU gel rather than rigid foam, it is the preferred polyurethane injection grout manufacturer choice for sealing concrete joints, masonry cracks, and underwater substrates where long-term flexibility and water resistance are required.
Q: How to find a reliable water-based polyurethane injection grout manufacturer?
A reliable water-based PU injection grout manufacturer must offer:
(1) a downloadable TDS with verified test data before purchase, (2) eco-friendly water-based formulation with non-toxic certification for potable water use, (3) both 8x and 16x foaming ratio options for different crack conditions, (4) free samples for actual substrate testing, (5) OEM customization for packaging, foaming ratio, and viscosity, (6) full export documentation including MSDS and dangerous goods classification. As a dedicated PU injection grout exporter and single-component polyurethane injection grout supplier, BOSLAI meets all six criteria — download our TDS, request a free sample, or contact us for OEM customization today.
Water-Based Polyurethane Injection Grout for Dynamic Water Sealing
Also called water-based PU grout, polyurethane gel injection grout, hydrophilic PU injection grout, or elastic PU grout, water-based polyurethane injection grout is engineered for dynamic water environments where flexibility and long-term elasticity matter more than rigid foam strength. This single-component polyurethane injection grout expands up to 20 × with a 428% foaming rate, has 686 mPa·s viscosity for deep penetration into fine cracks, and cures into a non-toxic, elastic PU gel seal. It is widely specified for basement crack repair, subway tunnel waterproofing, dam anti-seepage, bathroom waterproofing, and underground utility duct sealing.
Your PU Injection Grout Manufacturer and Exporter BOSLAI
As a dedicated polyurethane grout manufacturer, polyurethane injection grout manufacturer, and PU injection grout exporter, BOSLAI provides factory-direct pricing, full OEM customization, and complete export documentation including MSDS and non-toxic certification. We supply water-based polyurethane injection grout in 7kg, 10kg, and 20kg pails — in both 8x normal and 16x excellent foaming grades — with flexible MOQ for distributors and importers. Whether you specify it as PU grout gel, water-stopping polyurethane resin, or hydrophilic injection grout, BOSLAI is your reliable PU injection grout supplier shipping across Southeast Asia, the Middle East, Africa, and Europe. Request a free sample or download our TDS today.
Why Importers Choose BOSLAI?
As a dedicated polyurethane grout manufacturer in China, BOSLAI supplies distributors and contractors across 40+ countries. Our waterproofing chemical is produced in a 10,000-ton facility with strict batch-to-batch consistency. OEM clients receive private-label packaging, custom formulation adjustments, and full export documentation including TDS, MSDS, and COA. Whether you need a reliable polyurethane injection grout supplier for ongoing distribution or a factory partner for branded product lines, BOSLAI delivers quality at competitive FOB pricing.
