Product Introduction
Single-component polyurethane joint sealant is a high-performance polyurethane elastic sealing material that cures by absorbing moisture from the air. After curing, it forms a highly elastic rubber body capable of long-term accommodation to displacement changes in cracks and joints, preventing rainwater, dust, and debris from penetrating the underlying structure—thereby extending the service life of roads and building facilities.
This product requires no on-site mixing or heating, making application simple and convenient. It can be applied using a caulking gun, injection equipment, or manual methods—ideal for repairing small- to medium-sized cracks and sealing joints.
Product Features
High Elasticity
After curing, it forms a highly elastic sealing layer capable of withstanding long-term displacement changes without cracking or delaminating.
Strong Adhesion
Exhibits excellent adhesion to substrates such as asphalt, concrete, cement, steel, and stone.
Excellent Waterproof Performance
Effectively prevents rainwater penetration, reducing base layer damage and structural aging.
Excellent Weather Resistance
Features excellent UV resistance, high- and low-temperature resistance, and freeze-thaw cycle resistance.
Easy Installation
Single-component design—ready to use upon opening the container, no mixing or heating required, significantly improving construction efficiency.
Eco-Friendly and Low-Odor
Non-toxic and harmless after curing, meeting modern road maintenance and construction engineering requirements.
Application Scope
- Asphalt Pavement Crack Repair
- Concrete pavement crack repair
- Bridge Expansion Joint Sealing
- Airport runway joint repair
- Parking Lot Joint Maintenance
- Building expansion joint treatment
- Waterproof Sealing for Underground Engineering
- Industrial factory floor joints
Technical Specifications
Product Type: One-Component Polyurethane Sealant
Color: Black
Status: Paste-like
Curing Method: Moisture Curing
Surface drying time: 4–24 hours
Full curing time: 3–7 days
Elongation at Break: ≥400%
Displacement Capacity: ±25%
Operating Temperature: -40℃ to 80℃
Weather resistance: Excellent
Waterproof Performance: Excellent
Bonding Performance: Excellent
Packaging Specifications
Packaging:
- 600mlFlexible Packaging
- 600mlFlexible Packaging
Drum packaging:
- 20kg/bucket
- 20kg/bucket
OEM custom packaging is available upon customer request.
Construction Steps
- Clean dust, gravel, and debris from inside the crack.
- Keep the crack surface dry and clean.
- Use a dedicated primer to enhance adhesion when necessary.
- Evenly inject polyurethane crack filler into the crack.
- Level the surface and finish the edges.
- Allow to cure naturally before opening for use.
Storage and Transportation
The product should be stored in a cool, dry environment, avoiding direct sunlight and high-temperature exposure.
Shelf life is 12 months under unopened conditions.
Product Advantages
Compared with traditional hot-melt crack sealants, single-component polyurethane crack sealants do not require heating equipment, offering greater construction flexibility—ideal for parking lots, municipal roads, bridge projects, building joints, and small-area crack repair applications.
The product offers higher elasticity and superior waterproofing performance, effectively reducing long-term maintenance costs and extending the service life of engineering projects.
FAQ
Q: Does single-component polyurethane crack filler require heating?
A: No, construction can begin immediately after opening the bucket.
Q: Can it be used on asphalt pavements?
A: Yes, it has excellent adhesion performance on asphalt pavements.
Q: Can it be used for concrete cracks?
A: Yes, it is widely used in concrete crack and joint sealing projects.
Q: Does it have elasticity after curing?
A: After curing, it forms a highly elastic rubber body capable of accommodating long-term displacement changes.
Q: Do you support OEM services?
A: Supports packaging, labeling, and product customization services.
