Willseal 250-B Expansion Joint Seal
Willseal 250-B is a pre-compressed, self-expanding horizontal joint seal designed for primary applications in roads, bridges, and approach slabs. It features a durable, traffic-grade silicone coating engineered to withstand UV exposure, chemicals, and vehicular traffic. The proprietary foam core is impregnated with a hydrophobic acrylic emulsion and coated with a highway-grade silicone, forming a watertight seal even under extreme environmental conditions.
Key Benefits of Willseal 250-B
- Flexible Design: Accommodates up to ±60% joint movement, ideal for rapidly shifting horizontal joints.
- Easy Application: Non-invasive anchoring with no unbonded laminations for faster installs.
- Watertight Performance: Maintains a waterproof seal for joint widths from 1/2” to 4”.
- Durability: Resistant to UV radiation, deicing salts, and vehicular chemical exposure.
- Traffic-Ready: Factory-applied silicone face ensures it withstands vehicular and pedestrian loads.
Common Applications
- Road joints and bridge expansion joints
- Approach slabs and horizontal structural transitions
Packaging & Technical Info
- Delivered pre-compressed for easy fit into joints
- Silicone coating ensures waterproof and traffic-rated performance
- Passes movement cycling and ASTM performance standards
Product Properties
| Property | Value |
|---|---|
| Acrylic Impregnation | Proprietary, hydrophobic polymer |
| ASTM C711: Surface Temperature Range | -40 to 190 °F (-40 to 88 °C) |
| ASTM E1399: Movement Cycling | Pass, ±60% |
| Temperature Stability | 40 to 185 °F (40 to 85 °C) |
For similar horizontal joint solutions, view the Willseal FR-H. Visit Tremco’s official site for full product information and data sheets.
