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Tremco Willseal Seismic
Willseal Seismic is a pre-compressed, self-expanding open micro-cell polyurethane foam designed to provide a watertight, dust-proof, noise-reducing, thermally insulating, and UV stable primary seal. Capable of +/- 50% movement from the mean joint size.
- Thermally Insulating
- UV Stable
- No Invasive Anchoring Required
SKU
22394
Tremco Willseal Seismic
Tremco Willseal Seismic is a pre-compressed, self-expanding, open micro-cell polyurethane foam impregnated with a hydrophobic acrylic polymer. Coated with a factory-applied silicone sealant, it delivers a watertight, dust-proof, noise-reducing, thermally insulating, and UV stable primary seal. Suitable for vertical applications, it does not require invasive anchoring, making it ideal for use in seismic and primary expansion joints in exterior construction settings.
Key Features:
- Pre-compressed, self-expanding foam for easy installation
- Hydrophobic acrylic polymer for moisture resistance
- Puncture-resistant, elastomeric coating for durability
- Accommodates up to 100% (±50%) joint movement
- Non-invasive anchoring for hassle-free application
- Compatible with EIFS, masonry, granite, and curtain wall systems
- Available in a wide range of colors, including custom options
- UV stable and resistant to temperature extremes
Applications:
- Primary expansion, control, and isolation joints
- Seismic and retrofit joints
- Vertical expansion joints (use Willseal Seismic HS for horizontal)
- Joints in precast concrete, masonry, brick, and facades
- Exterior insulation finish systems (EIFS) and curtain walls
- Joints in exterior panel systems such as masonry, granite, and metal
Technical Specifications:
| Property | Value |
|---|---|
| Foam Color | Black |
| Temperature Stability Range | -40 to 185 °F (-40 to 85 °C) |
| Tensile Strength | 21 psi min |
| Ultimate Elongation | 125% ± 20% |
| Compression Set | 2.5% max |
| Flammability | Self-Extinguishing (UL 94VO; CAL 117) |
| Durometer Hardness | Shore A 15 |
| STC (Sound Transmission Class) | 54 |
| Packaging | Sticks (6.5 ft lengths) |
Frequently Asked Questions:
Can Willseal Seismic be used in horizontal joints?
No, Willseal Seismic is designed for vertical applications. Use Willseal Seismic HS for horizontal joints.
What colors are available?
Willseal Seismic is available in Tremco standard Spectrem colors and custom colors upon request.
What is the service temperature range?
The temperature stability range is -40°F to 185°F (-40°C to 85°C).
| Brand | Tremco |
|---|---|
| Manufacturer | Tremco |
