PU Waterproof Leak Repair High Elastic PU Foam Grouting Material

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PU Waterproof Leak Repair High Elastic PU Foam Grouting Material

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Product Description

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Basic Specifications

Model NO.

SY-G202

Usage Method

Spray / Injection

Application

Injection Leak Repair

Color

Brown / Light Yellow

Density

1.03-1.08 g/cm3

Viscosity

800-1000 MPa.S

Shelf Life

6 Months

Package

25kg/Drum or 200kg/Drum

Origin

China

HS Code

390931000

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General Description

SY-G202 is a high-performance grouting material that reacts with water to form an elastic foam with a porous structure. This foam possesses excellent adhesive properties and unique hydrophilic characteristics. Upon encountering water again, the formed elastic foam can shrink and absorb water twice, with an expansion rate exceeding 100%.

It provides a superior secondary water plugging effect and is widely utilized in professional engineering fields such as subway tunnels, water resources, hydropower projects, and underground garages.

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Key Advantages

Convenient construction for rapid application.

Good miscibility with water for effective reaction.

Excellent extensibility, maintaining shape permanently in water.

Low shrinkage compared to conventional market materials.

Secondary expansion capability for enhanced plugging.

High elasticity to accommodate joint deformations and settlement.

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Technical Parameters

Item	Index (T: 23±2ºC, Humidity: 50±5%)
Appearance	Light yellow transparent liquid
Density (kg/L)	≥1
Viscosity (mPa.S)	500-800
Gel time (s)	10-200 (with 1 time water)
Non-volatile matter (%)	≥80
Foaming capacity (1:1)	≥500%
Water expansion rate (%)	≥100%

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Professional Applications

This material is engineered for critical infrastructure repair including:

Subways, tunnels, and underground construction joints.
Structural cracks and deformation joint plugging.
Bridge piers, dams, and hydropower station reinforcements.
Water towers, pools, and basement seepage control.
Soft foundation reinforcement and mine construction plugging.

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R&D and Quality Control

Our facilities are equipped with professional polyurethane technology and over 15 years of experience in the industry.

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Frequently Asked Questions

Q: How does SY-G202 achieve a "secondary water plugging" effect?

A: The elastic foam formed after the initial reaction has hydrophilic properties. When it encounters water again, it undergoes secondary expansion (over 100%), which fills any remaining gaps or new cracks.

Q: Is SY-G202 suitable for joints that experience movement?

A: Yes, the material forms an elastic consolidated body with high extensibility, making it ideal for deformation joints and settlement joints that undergo structural shifts.

Q: What is the recommended mixing ratio with water for foaming?

A: While it reacts directly with moisture in the environment, a 1:1 ratio with water is typically used to test its maximum foaming capacity and expansion rates.

Q: What are the primary storage requirements?

A: It should be stored in a cool, dry, and well-ventilated area. The shelf life is 6 months when kept in its original sealed container.

Q: Can this be used in large-scale infrastructure like subways?

A: Absolutely. It is widely used in subway tunnels, railway culverts, and hydropower dams due to its impermeability and durability in permanent water immersion.

Q: What is the difference between this and conventional grouting materials?

A: SY-G202 features significantly lower shrinkage rates and maintains its elastic shape permanently in water, whereas conventional materials may degrade or shrink over time.