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Tremco Willseal Seismic HS
Tremco Willseal Seismic HS is a pre-compressed silicone-faced foam seal for non-trafficked horizontal joints, in 1/2 in to 4 in sticks. It is used on floor-to-wall and exterior panel joints, and holds ±50% movement.
- Non-trafficked horizontal primary seal
- Floor-to-wall and exterior panel joints
- Factory silicone face, color-matched to the joint
Willseal Seismic HS - Horizontal Expansion Seal
Tremco Willseal Seismic HS is a pre-compressed, self-expanding polyurethane foam joint seal with a factory silicone face for non-trafficked horizontal joints. It is used on precast floor-to-wall joints, retrofit and seismic joints, and exterior panel systems. Up to ±50% movement in joints up to 4 in wide makes it a fit where a watertight primary seal is needed without invasive anchors.
Key Features
- Pre-compressed acrylic-impregnated polyurethane foam
- Factory-applied silicone face
- Non-trafficked horizontal joints
- Joints up to 4 in wide
- Up to ±50% movement
Applications
- Non-trafficked horizontal expansion joints.
- Precast floor-to-wall joints.
- Retrofit and seismic joints.
- Exterior masonry, granite, metal, and curtainwall panels.
Technical Specifications
| Property | Value |
|---|---|
| Movement | Up to 100% (±50%) |
| Joint sizes | 1/2 in to 4 in sticks, 6.5 ft |
| STC | 54, ASTM E90-09 |
| OITC | 48, ASTM E90-09 |
| Tensile | 21 psi min, ASTM D3574 |
| Foam elongation | 125% ± 20%, ASTM D3574 |
| Temperature stability | −40 to 185°F |
| Install temperature | −14 to 95°F |
Documents
Willseal Seismic HS Technical Data Sheet
Frequently Asked Questions
What horizontal joints is Tremco Willseal Seismic HS used on?
Non-trafficked horizontal joints: precast floor-to-wall, retrofit and seismic joints, and exterior panel systems.
What traffic is Tremco Willseal Seismic HS used with?
None. It is used as a primary seal in non-trafficked horizontal applications.
What floor-to-wall joints is Tremco Willseal Seismic HS used on?
Precast floor-to-wall joints, retrofit and seismic joints, and exterior panel systems.
What is the factory coating of Tremco Willseal Seismic HS?
Factory-applied silicone sealant.
What is the application temperature of Tremco Willseal Seismic HS?
Do not install below −14°F or above 95°F.
What panel systems is Tremco Willseal Seismic HS used on?
Masonry, granite, metal, and curtainwalls.
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