Willseal Seismic Seal | Pre-Compressed Expansion Joint Solution
The Willseal Seismic Seal is a pre-compressed, self-expanding foam joint seal featuring a factory-applied silicone sealant face. Engineered to create a watertight, dustproof, and UV-stable barrier, this expansion joint solution is designed for vertical applications requiring superior flexibility and performance. Its hydrophobic, open-cell foam core impregnated with acrylic polymer ensures long-lasting durability, while the silicone surface delivers reliable weatherproofing for modern building envelopes.
Key Benefits of the Willseal Seismic Seal
- Watertight vertical seal using hydrophobic, open-cell foam with silicone coating
- Accommodates up to ±50% movement at rapid rates, ideal for seismic and dynamic joints
- Non-invasive anchoring for easy application and secure installation
- Compatible with exterior insulation and finish systems (EIFS)
- Factory-coated with silicone sealant in standard or custom colors for improved aesthetics
- Available with tamper-resistant coatings for additional durability in exposed environments
Common Applications
The Willseal Seismic Seal is optimized for primary and vertical construction joints, EIFS systems, and exterior panel assemblies. Its superior flexibility and thermal stability make it ideal for buildings subject to seismic activity or wide movement cycles.
Packaging and Performance
Delivered pre-compressed for fast installation, Willseal Seismic simplifies jobsite workflow by eliminating unbonded laminations and the need for mechanical anchors. It is factory-finished with a durable silicone coating to ensure lasting performance in demanding conditions.
Product Properties
| Property | Value |
|---|---|
| ASTM C518: Thermal Conductivity | 0.05 W/m°C |
| ASTM D3574: Ultimate Elongation | 125% ± 20% |
| Foam Color | Black |
| Temperature Stability | -40 to 185 °F (-40 to 85 °C) |
For another Tremco transition solution, explore the Proglaze ETA System. For additional Tremco resources, visit TremcoSealants.com.
