Hydrophilic Polyurethane Injection Grouting waterproof Material

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Hydrophilic Polyurethane Injection Grouting waterproof Material

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Product Description

📌 Basic Information

Material: Polyurethane
Usage Method: Spray / Injection
Main Usage: Water Stop, Outdoor Waterproofing

Appearance: Liquid
Density: 1.0-1.2 g/cm³
Solid Content: 75-90%

Foaming Capacity: 500-10000%
Transport Package: 18kg/Drum
Production Capacity: 10000 tons/Year

🔍 Product Description

VPU-1 Single Component Waterborne Hydrophilic Polyurethane Grouting Material is a high-performance chemical solution for waterproof plugging and reinforcement repair of concrete leakage.

This product reacts rapidly with water, solidifying and expanding to close cracks quickly. It forms a milky white elastic colloid with high strength, low shrinkage, and superior impermeability. It is ideal for subway tunnels, water conservancy, hydropower, and underground infrastructure.

Hydrophilic Polyurethane Injection Material

⭐ Key Characteristics

Low viscosity for deep crack penetration.
Quick reaction in water to form an impervious elastic seal.
High compressive strength and excellent temperature resistance.
Adjustable viscosity and curing speed based on site requirements.
Environmentally friendly waterborne system.

📊 Product Parameters

No.	Item	Test Standard / Result
1	Appearance	Light Yellow Transparent Liquid
2	Density (g/cm³)	1.0-1.2
3	Viscosity (mpa.s)	150-350
4	Gel Time (s)	10-100
5	Solid Content (%)	75-90
6	Foaming Capacity (%)	500-1000
7	Expansion Rate with Water (%)	20-30
8	Water Absorption Capability	20-70s

🔄 PU Grouting Materials Comparison

Feature	VPU-2 (Hydrophobic)	VPU-1 (Hydrophilic)
Characteristics	High Foaming Rate, Fast Speed	High Solid Content, Low Shrinkage
Reaction Time	15-20 Minutes	10-20 Seconds
Waterproof Feature	Displacing Water	Reacts with water to form solid state
Advantage	No Shrinkage, Good Stability	Fast Response, Cost-effective
Environment	No shrinkage stability	Dry, Wet, or Open Water

🛠️ PU Grouting Steps & Method

Repair of concrete structures is achieved through high-pressure or low-pressure injection. High-pressure injection is specifically used for heavy water flow areas like basements and tunnels.

Standard Process:

Drill holes according to the crack distribution.
Install injection packers.
Inject PU grout until the crack is fully saturated.
Allow the material to expand and seal the void.

📦 Related Accessories

Your One-Stop Concrete Crack Repair Arsenal:

High-Pressure Grouting Machines: For targeted, powerful sealing.
Injection Packers: To seal openings securely.
High-Pressure Pipes & Valves: For precise flow control.
Grease Couplers: To maintain machine efficiency.

🌍 Product Applications

Construction Projects
Deformation joints, construction joints, and structural crack reinforcement.

Underground Infrastructure
Subway tunnels, highway tunnels, and railway subgrades.

Hydraulic Engineering
Dams, bridge piers, and hydropower station curtain grouting.

🏭 Packaging & Storage

Packing: 18kg / Steel Drum

Shelf Life: 6 Months

Storage Guidelines: Store in a ventilated, dry, and cool place. Keep away from fire and heat sources. Construction should be performed in well-ventilated conditions with proper safety gear.

Pro-Tip: Never add diluents to this product. Test gel time on-site before full-scale application.

❓ Frequently Asked Questions

Q1: What is the main difference between hydrophilic and hydrophobic PU? A1: Hydrophilic PU (VPU-1) reacts with water and can trap excess water within its structure, making it ideal for wet environments. Hydrophobic PU (VPU-2) displaces water and is known for high stability and zero shrinkage.

Q2: Can VPU-1 be used for moving expansion joints? A2: It is recommended to avoid using standard gels in joints with high movement. While PU foams are flexible, they may split if they cannot disperse tension under extreme compression in expansion joints.

Q3: How long is the shelf life of the grouting material? A3: The shelf life is typically 6 months when stored in a cool, dry, and ventilated environment away from heat sources.

Q4: What should I do if the water seepage is very large? A4: For areas with heavy water gushing, it is often necessary to use a specialized fast-setting water-plugging material first before proceeding with the standard PU grouting.

Q5: Is it necessary to test the gel time before use? A5: Yes, always test the gel time according to your specific on-site environmental conditions to ensure the reaction is neither too slow (ineffective) nor too fast (damages equipment).

Q6: Can I dilute the product to save costs? A6: No, it is strictly forbidden to add any diluents to this product as it will compromise the chemical reaction and structural integrity of the seal.