High-Speed Railway Subgrade Special Coating
HS800B is a 100% solids spray polyurea coating specially developed for high-speed railway subgrade waterproofing and protection. It provides excellent flexibility, impact resistance, abrasion resistance and aging resistance. With fast curing and seamless protection, HS800B effectively prevents water penetration and improves the durability of railway infrastructure under long-term outdoor conditions.
Product Overview
Advanced Polyurea Protection for High-Speed Railway Subgrades
HS800B is a 100% solids, two-component spray polyurea protective coating specially developed for waterproofing and anti-corrosion protection of high-speed railway subgrades and transportation infrastructure.
The coating combines excellent flexibility, impact resistance, abrasion resistance and aging resistance to provide long-term protection under outdoor environmental conditions. Its seamless membrane structure effectively prevents water, air and oxygen penetration, helping improve the durability of railway foundation structures.
With rapid curing performance, HS800B can be sprayed on curved, inclined and vertical surfaces without sagging, providing an efficient construction solution for demanding railway protection projects.
Protection Challenges in Railway Subgrade Systems
High-speed railway subgrades are exposed to:
- Rainwater penetration
- Temperature changes
- Freeze-thaw cycles
- Surface deformation
- Mechanical impact
- Long-term outdoor aging
Water infiltration and environmental damage may affect structural durability and increase maintenance requirements.
HS800B provides a continuous waterproof protective layer to enhance the service life of railway infrastructure.
How HS800B Protects Railway Structures
After application, HS800B rapidly cures into a flexible and durable elastomeric membrane.
The coating provides:
- Seamless waterproof protection
- Strong adhesion to substrates
- Crack-bridging capability
- Resistance to abrasion and impact
- Long-term weather durability
Its elastic properties allow the coating to adapt to minor substrate cracks and deformation.
Key Performance Advantages
Excellent Waterproof Protection
HS800B forms a seamless protective membrane that effectively blocks water penetration and protects railway subgrade structures from moisture damage.
High Flexibility and Crack Resistance
With high elongation performance, HS800B can accommodate minor movement and deformation of concrete structures while maintaining coating integrity.
Strong Impact and Wear Resistance
The tough polyurea coating provides excellent resistance against:
- Mechanical impact
- Surface abrasion
- External damage
ensuring reliable protection in demanding transportation environments.
Fast Curing and Efficient Construction
HS800B cures rapidly after spraying and can be applied on horizontal, inclined and vertical surfaces.
This helps improve construction efficiency and reduce project downtime.
Application Areas
HS800B is suitable for:
- High-speed railway subgrades
- Railway concrete structures
- Transportation infrastructure
- Roadbed waterproof protection
- Outdoor concrete protection systems
Technical Specifications
| Property | Typical Value |
|---|---|
| Product Type | Two-Component Spray Polyurea Coating |
| Solid Content | 100% |
| Gel Time | 7–15 Seconds |
| Tack-Free Time | 30–50 Seconds |
| Recommended Thickness | ≥1500 μm |
| Hardness | Shore A 85–90 |
| Tensile Strength | 19 MPa |
| Elongation | ≥450% |
| Tear Strength | ≥55 N/mm |
| Water Impermeability | 0.4 MPa / 60 min |
| Wear Resistance | 30 mg |
| Impact Resistance | 1.5 kg·m |
| Temperature Resistance | -35°C to +120°C |
Chemical Resistance Performance
HS800B provides stable protection against various environmental exposures.
| Test Condition | Performance |
|---|---|
| Water Resistance (30 days) | No rust, bubbles or peeling |
| Acid Resistance | No rust, bubbles or peeling |
| Alkali Resistance | No rust, bubbles or peeling |
| Salt Resistance | No rust, bubbles or peeling |
| Salt Spray Resistance (2000h) | No rust, bubbles or peeling |
| Oil Resistance | No rust, bubbles or peeling |
Recommended Application System
For optimum performance:
Concrete Substrate
↓
Surface Preparation
↓
Concrete Primer (EP1304 / HP6303K)
↓
Surface Repair Treatment
↓
HS800B Spray Polyurea Coating
↓
Polyaspartic Polyurea Topcoat
This system provides enhanced waterproofing and weather protection for railway infrastructure.
Application Guide
Recommended Equipment
HS800B should be applied using professional two-component high-pressure polyurea spray equipment.
Recommended:
- GRACO H-XP3 Polyurea Spray Equipment
- 1:1 Ratio Spray System
Application Conditions
| Parameter | Requirement |
|---|---|
| Operating Temperature | 0–35°C |
| Material Heating Temperature | 55–65°C |
| Recommended Ambient Temperature | ≥10°C |
| Relative Humidity | <80% |
Construction Process
1. Surface Preparation
Clean the substrate surface and remove dust, oil, loose materials and contaminants.
2. Primer Application
Apply concrete primer evenly to improve adhesion.
3. Surface Repair
Repair pores, cracks and uneven areas before spraying.
4. Polyurea Spraying
Apply HS800B using professional spray equipment to form a continuous protective coating.
5. Topcoat Application
Apply polyaspartic polyurea topcoat when additional weather resistance is required.
Why Choose HS800B Railway Polyurea Coating?
Compared with traditional waterproofing materials, HS800B provides:
- 100% solids environmentally friendly formulation
- Seamless waterproof protection
- Excellent flexibility
- High impact resistance
- Superior abrasion resistance
- Fast curing performance
- Long-term outdoor durability
- Reduced maintenance requirements
HS800B provides a reliable waterproof and protective solution for high-speed railway subgrades and transportation infrastructure exposed to complex environmental conditions.
Frequently Asked Questions
1. What is HS800B used for?
HS800B is designed for waterproof and anti-corrosion protection of high-speed railway subgrades and related transportation structures.
2. Why use polyurea coating for railway infrastructure?
Polyurea provides seamless waterproofing, high flexibility, impact resistance and long-term durability, making it suitable for demanding infrastructure projects.
3. Can HS800B be applied on vertical surfaces?
Yes. Its rapid curing properties allow spraying on curved, inclined and vertical surfaces without sagging.
4. What thickness is recommended for HS800B?
The recommended coating thickness is above 1500 μm depending on project requirements.
5. Does HS800B require professional equipment?
Yes. Two-component high-pressure polyurea spray equipment is required to ensure proper mixing and application quality.
Packaging and Storage
Packaging
- Component A: 220 kg / 200L drum
- Component B: 210 kg / 200L drum
Color
Standard color: Gray
Other colors available according to customer requirements.
Storage
Store in a cool and dry place at 5–35°C. Avoid direct sunlight.
Shelf Life
9 months under recommended storage conditions.
