Polyurethane Sealants for Construction
Product information
|
Testing Items |
Standard |
Typical Value |
Executive Standards |
|
Appearance |
/ |
Black White Gray |
/ |
|
Density (g/m³) |
1.5 ± 0.1 |
1.5 |
GB/T 13477.2 |
|
Sagging properties (mm) |
≤0.5 |
0 |
GB/T 13477.6 |
|
Tack free time (min) |
30-60 |
40 |
GB/T 13477.5 |
|
Curing speed (mm/d) |
≥3.0 |
3.0 |
HG/T 4363 |
|
Volatile content (%) |
≤3 |
1 |
GB/T 2793 |
|
Shore A-hardness (A°) |
40-50 |
48 |
GB/T 531.1 |
|
Tensile strength (MPa) |
≥1.5 |
2.0 |
GB/T 528 |
|
Elongation at break (%) |
≥500 |
550 |
GB/T 528 |
|
Elastic Recovery Rate % |
≥80 |
80 |
GB/T 7124 |
|
Extrudability (ml/min) |
≥250 |
320 |
GB/T 13477.4 |
Construction polyurethane sealant is a high-performance single-component or two-component sealing material formulated with premium polyurethane resin. It offers outstanding adhesion, elasticity, and durability. After curing, it forms a resilient sealing layer that effectively accommodates structural micro-movements and thermal expansion, making it ideal for sealing joints in building facades, curtain walls, doors, windows, and other construction gaps.
Applications
Building Facades & Curtain Walls
Sealing gaps in glass curtain walls, aluminum panels, stone, and composite boards.
Doors & Windows Installation
Waterproofing and windproofing at the interface between frames and walls.
Structural & Expansion Joints
Sealing building expansion joints, beam-column interfaces, and floor gaps.
Interior Decoration
Preventing cracks and leaks in flooring, ceilings, partitions, and pipe interfaces.
Key Features
- High Adhesion – Bonds firmly to concrete, metal, stone, glass, and wood.
- Excellent Elasticity – Maintains flexibility after curing, absorbing structural movement and vibration.
- Durable & Weather-Resistant – Withstands UV, rain, temperature fluctuations, and harsh climates.
- Eco-Friendly & Safe – Low VOC, non-corrosive, compliant with international building standards.
- Easy Application – Single-component ready-to-use or two-component with precise mixing ratio; cures without shrinkage or cracking.
- Tensile & Compressive Strength – Resists high levels of stretching, compression, and shear stress.
- Temperature Resistance – Long-term service from -40°C to +90°C, tolerating higher temperatures for short periods.
- Aging Resistance – Outdoor use without chalking or cracking; service life up to 15–20 years.
- Chemical Resistance – Stable against common building chemicals and cleaning agents.
Storage & Shelf Life
Storage Conditions
Store in a cool, dry, and ventilated place, away from direct sunlight and high heat.
Recommended Temperature
Best stored between 5°C and 27°C.
Shelf Life
9–12 months in unopened original packaging; products beyond this period should be tested before use.
Products Description
Available in a range of standard colors to meet design requirements. Common options include: Black,White, Grey, Beige Grey, Sandstone. Custom colors are available upon request (subject to minimum order quantities).
Product Types
Single-Component Construction Polyurethane Sealant
Convenient for general construction, good elasticity, easy application.Two-Component
Construction Polyurethane Sealant
Fast curing, strong adhesion, suitable for structural sealing and large-scale projects.High-Performance Waterproof
Polyurethane Sealant
Enhanced waterproof and crack-resistant properties for facades, curtain walls, andhigh-humidity environment
Product Details:
FAQ
Q: What is the difference between polyurethane sealant and silicone sealant?
A: Polyurethane sealant has stronger adhesion, is paintable, and offers better abrasion resistance, making it ideal for structural sealing. Silicone sealant has better weather resistance but is generally not paintable and has lower adhesion to some substrates.
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