Description
Benefits of Using Willseal Seismic in Your Next Project
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Watertight Vertical Seal
Open-cell foam impregnated with a hydrophobic, acrylic polymer and coated with a factory-applied silicone sealant creates a watertight seal
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Flexible
Accommodates +/-50% movement at rapid rates
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Easy Application
Utilizes non-invasive anchoring and leaves no unbonded laminations
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EIFS Friendly
Approved for use with exterior insulation & finish systems (EIFS)
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Improved Aesthetics
Available factory-coated with silicone sealant in standard or custom colors to match the desired appearance
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Tamper-Resistant Option
Can be supplied with a higher durometer, tamper-resistant sealant coating
Willseal Seismic Is Best For
- Primary construction joints
- Vertical construction joints
- EIFS
- Exterior panel systems
Product Properties
| 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) |






