Polyurea Injection Grout Manufacturer - 98% Proven

BOSLAI Polyurea Injection Grout (Polyurea Grouting Materials) is a high-performance polymer injection grout characterized by excellent waterproofing, high elasticity, chemical resistance, high solid content, and non-shrinkage properties. Its sealing performance surpasses that of conventional sealants. Additionally, the product offers high tensile strength and elongation atbreak, enabling it to bridge various structural cracks, pavement cracks, and voids. It effectively addresses leakage and recurrent leakage issues caused by
expansion joints, contraction joints, and connection joints.

Single-component / Eco friendly / OEM Accepted / High Elasticity / Chemical Resistant

BOSLAI polyurea injection grout supplier and exporter

Where Can BOSLAI Polyurea Injection Grout Be Applied?

1.Civil Engineering: Polyurea sealant is used in water conservancy projects such as dam reinforcement and seepage prevention, enhancing safety

2.Subway Tunnels: In tunnel construction, polyurea grouting fills gaps between tunnel linings and surrounding rocks, preventing water leakage and ensuring safety

3.Bridge Repair: Polyurea sealant, with its fast curing and high strength, is ideal for repairing bridge cracks and restoring load-bearing capacity

4.Industrial and Civil Buildings: Polyurea sealant is used for waterproofing in basements, roofs, and walls, protecting the building structure.

What Are the Packaging Options and Warranty?

Specification:	9kg/pail or 20kg/pail
Appearance:	Single component, gray viscous liquid.
Shelf Life:	1 Year

What Are the Technical Specifications?

Item	Data
Solid content, %	98
Surface dry time, h	3
Full Drying time, h	7
Tensile strength, MPa	1.3
Elongation at break, %	402
Waterproofness	0.3MPa, 120min, waterproof
Heating shrinkage rate, %	-1.9

TDS_Polyurea Injection Grout

TDS-Polyurea Injection Grout 下载

What are the key features and advantages of BOSLAI Polyurea Injection Grout?

Exceptional Durability: esistant to water immersion, acid and alkali, and high temperatures.
Underwater Curing Capability: Can fully cure in water, tightly bonding with concrete even in humid or submerged conditions.
Strength and Elasticity Balance: Possesses certain strength and elasticity, reinforcing structures while accommodating deformation.
Dense Structure and Waterproof Performance: Dense internal structure, outstanding waterproof performance.
Non-Shrinkage After Curing
Excellent Adhesion to Multiple Substrates: Excellent adhesion to concrete, ceramic tile, and metal surfaces.

Customization Service

Customization is available for product forming rate, packaging design, and package sizes.

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Contact us

Address

Building 12, Yun Chao Fu, Hangzhou City, Zhejiang Province, china.

Phone

+86 15231151892
+86 15906641341

info@boslaiwaterproof.com

FAQ

What is polyurea injection grout?

Polyurea injection grout is a single-component, gray viscous polymer grouting material with high solid content (98%), high elasticity (402% elongation), and non-shrinkage properties. It is designed to seal structural cracks, expansion joints, and voids in concrete by forming a dense, waterproof, and chemically resistant membrane. Unlike conventional sealants, it bonds strongly to concrete, tile, and metal surfaces and can cure even underwater.

Can polyurea injection grout cure underwater?

Yes. This is one of the key advantages of polyurea injection grout. It can fully cure in water and bond tightly with concrete even in humid or submerged conditions. This makes it ideal for applications where water ingress is active — tunnel linings, dam seepage repair, basement leaks, and other below-grade environments where drying the surface is not practical.

What is the difference between polyurea grout and PU injection grout?

Both are used for crack injection and water stop, but they serve different purposes. PU injection grout (polyurethane) expands on contact with water and is best for active leak sealing in narrow cracks. Polyurea grout is more elastic (402% elongation) and does not shrink after curing — making it better for dynamic joints, bridge cracks, and pavement where structural movement is expected. Polyurea also offers stronger chemical resistance and higher bonding strength (1.4 MPa).

What equipment is needed to inject polyurea grout?

A polyurea-specific injection machine or a grouting machine with a minimum power rating of 1500W is required. Standard low-power machines may not dispense the product properly due to its high viscosity. The complete injection process involves: (1) crack inspection, (2) drilling holes at 20–50 cm spacing at a 45°–70° angle, (3) installing packers, (4) injecting grout from bottom to top, and (5) sealing holes after 24 hours. TDS with full guidelines is available for download.

What are the key advantages of polyurea injection grout over traditional sealants?

(1) 98% solid content — near-zero VOCs, very low shrinkage (-1.9%). (2) Underwater curing — works in submerged conditions where most sealants fail. (3) High elasticity — 402% elongation bridges structural movement without cracking. (4) Excellent adhesion — 1.4 MPa to concrete, also bonds to tile and metal. (5) Chemical and temperature resistant — withstands acid, alkali, high temperatures, and down to -40°C. (6) Can also be used as an interior waterproof coating.

What applications is polyurea grout best suited for?

Polyurea injection grout is best for: dam reinforcement and seepage prevention, subway tunnel gap filling between linings and surrounding rock, bridge crack repair with load-bearing restoration, and waterproofing in basements, roofs, and walls of industrial and civil buildings. It also works for pavement cracks and structural joints where flexibility and long-term durability are required.

How to find a reliable polyurea injection grout supplier?

Evaluate on five criteria: (1) TDS with complete technical data — solid content, tensile strength, elongation, and bonding strength. (2) Specialized waterproofing manufacturer with in-house production — not a reseller. (3) Free sample support to verify performance on your actual structure. (4) OEM capability for custom packaging, forming rate, and private labeling. (5) Export experience with MSDS, dangerous goods documentation, and customs clearance support. At BOSLAI, we meet all five — download our TDS or contact us for a sample and quotation.

Polyurea Sealant and Chemical Grout for Crack Injection

Also called polyurea sealant, polyurea chemical grout, polyurea crack injection, or PU polyurea grout — polyurea injection grout is a high-performance polymer grouting material with 98% solid content and near-zero shrinkage. Unlike conventional polyurethane grouts, this polyurea grouting material cures underwater, resists chemical corrosion, and maintains flexibility from -40°C to high temperatures. It bonds strongly to concrete, tile, and metal — making it a versatile solution for structural waterproofing, crack repair, and joint sealing.

Ideal for Expansion Joints, Deformation Joints, and Chemical Exposure

Polyurea injection grout is the preferred choice for expansion joints, contraction joints, and deformation joints where structural movement is continuous. With 402% elongation at break and non-shrinkage after curing, it bridges dynamic cracks without losing adhesion. It also excels in aggressive chemical environments — resistant to acid, alkali, and industrial fluids that degrade standard polyurethane grouts. Common applications include chemical plant floors, wastewater treatment tanks, bridge expansion joints, subway tunnel segment joints, and dam movement joints.

Your Polyurea Injection Grout Manufacturer and Exporter in China

As a specialized polyurea injection grout manufacturer, BOSLAI supplies polyurea sealant and polyurea grouting material to distributors and importers worldwide. We offer factory-direct pricing, full OEM customization — private-label packaging, custom formulations, and tailored solid content — plus export support covering MSDS and dangerous goods documentation. Whether you need a reliable polyurea grout supplier for bulk orders or prefer to test with a free sample first, download our TDS or contact us for a quotation.