Description
BOSS® 822 Expansion Joint Sealant is a self-leveling, one-component sealant designed for smooth, durable joint filling.
BOSS® 822 is a free-flowing, self-leveling sealant that easily fills joints and cracks to create a smooth, long-lasting seal. Supplied ready-to-use, it cures at room temperature into a tough, rubbery solid. This high-performance sealant adheres well to a wide range of construction materials including concrete, wood, vinyl, glass, and most plastics.
It is engineered to resist weathering, moisture, vibration, ozone, thermal expansion, and extreme temperatures while maintaining flexibility.
- One-component, ready-to-use formula
- Free-flowing and self-leveling for easy application
- Accommodates ±50% joint movement
- Strong adhesion to a wide variety of substrates
- VOC compliant
- Suitable for use on concrete, brick, masonry, wood, glass, vinyl, and most plastics
- Remains flexible from -85°F to 400°F (-65°C to 204°C)
Colors
Cartridge:
- 142931 – White
- 142930 – Tan
- 142929 – Grey
Custom colors available upon request.
Specifications
| Uncured Properties | |
| Chemistry | Oxime |
| Viscosity | 110,000 cps |
| Specific Gravity | 1.17 |
| Tack-Free Time | 30 minutes |
| Application Temperature | -35°F to 140°F |
| Cured Properties | |
| Hardness (Shore A) | 23 |
| Tensile Strength | 150 psi |
| Elongation | 300% |
| Service Temperature | -40°F to 325°F |
Adhesion-in-Peel
- Poplar: 20
- Oak: 20
- Pine: 20
- Concrete: 15
*Values may vary depending on environmental conditions such as temperature, humidity, and substrate type.
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