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Tremco Willseal Seismic HS
Willseal Seismic-HS is a pre-compressed, self-expanding open micro-cell polyurethane foam impregnated with a hydrophobic, acrylic polymer and coated with a factory-applied silicone sealant. It is designed to provide a watertight, UV stable primary seal that does not require invasive anchoring for installation.
- Dust-Proof
- Noise-Reducing
- Thermally Insulating
SKU
22395
Tremco Willseal Seismic-HS - Horizontal Expansion Joint Sealant
Tremco Willseal Seismic-HS is a pre-compressed, self-expanding polyurethane foam joint sealant designed for horizontal, non-traffic expansion joints. Featuring a hydrophobic acrylic polymer impregnation and factory-applied silicone sealant, Willseal Seismic-HS provides superior watertight, dust-proof, and thermally insulating performance. It accommodates up to 100% movement (±50%) and offers excellent compression recovery. Ideal for seismic, retrofit, and construction joints, Willseal Seismic-HS delivers unmatched reliability for a wide range of commercial and architectural applications.
Key Features:
- Pre-compressed and self-expanding for quick installation
- Accommodates up to ±50% movement
- Puncture-resistant elastomeric coating for enhanced durability
- UV-stable and waterproof for long-term performance
- Available in a wide range of Tremco Spectrem standard and custom colors
- Non-invasive anchoring ensures compatibility with various substrates
Applications:
- Seismic and retrofit joints
- Horizontal expansion joints in non-traffic areas
- Pre-cast concrete floor-to-wall joints
- Exterior panel systems including masonry, granite, and curtainwalls
Technical Specifications:
| Specification | Details |
|---|---|
| Material | Open micro-cell polyurethane foam |
| Movement Range | ±50% |
| Temperature Stability | -40°F to 185°F (-40°C to 85°C) |
| Thermal Conductivity | 0.05 W/m·°C |
| Tensile Strength | 21 psi min |
| Compression Set | 2.5% max |
| STC / OITC Ratings | STC 54 / OITC 48 |
Frequently Asked Questions:
What joint sizes are available for Willseal Seismic-HS?
Willseal Seismic-HS is available in sizes ranging from ½” to 4” in 6.5 ft lengths. Custom sizes are also available upon request.
Can this product be used in traffic areas?
No, Willseal Seismic-HS is designed for non-traffic horizontal joints. For traffic-rated applications, consult Tremco for alternative solutions.
| Brand | Tremco |
|---|---|
| Manufacturer | Tremco |
