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Tremco Willseal Seismic
Tremco Willseal Seismic is a pre-compressed silicone-faced foam seal for vertical joints, in 1/2 in to 8 in sticks. It is used on precast, masonry, facades, and curtainwalls, and holds ±50% movement.
- Factory silicone face for color-matched vertical joints
- Watertight and dust-proof on precast, masonry, and facades
- Noise-reducing primary seal without invasive anchors
Willseal Seismic - Vertical Expansion Seal
Tremco Willseal Seismic is a pre-compressed, self-expanding polyurethane foam joint seal impregnated with a hydrophobic acrylic polymer and coated with a factory silicone face. It is used as a primary seal on vertical expansion joints in precast, masonry, brick, facades, EIFS, and curtainwalls. Up to ±50% movement makes it a fit for retrofit and seismic joints that need a watertight seal without invasive anchors.
Key Features
- Pre-compressed acrylic-impregnated polyurethane foam
- Factory-applied silicone face
- Up to ±50% movement
- Watertight, dust-proof, UV-stable primary seal
- Installs without invasive anchors
Applications
- Vertical expansion, control, and isolation joints.
- Retrofit and seismic joints.
- Precast, masonry, brick, and facades.
- EIFS and exterior panel systems.
Technical Specifications
| Property | Value |
|---|---|
| Movement | Up to 100% (±50%) |
| Joint sizes | 1/2 in to 8 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 Technical Data Sheet
Frequently Asked Questions
What vertical joints is Tremco Willseal Seismic used on?
Precast, masonry, brick, facades, EIFS, and exterior panel systems. Vertical expansion, control, isolation, retrofit, and seismic joints.
What is the movement of Tremco Willseal Seismic?
Up to 100% (±50%).
What is the silicone face of Tremco Willseal Seismic?
Factory-applied silicone sealant in Tremco standard Spectrem colors.
What is the install temperature of Tremco Willseal Seismic?
Do not install below −14°F or above 95°F.
What curtainwalls is Tremco Willseal Seismic used on?
Masonry, granite, metal, and curtainwall exterior panels.
What EIFS is Tremco Willseal Seismic used on?
EIFS, plus precast, masonry, brick, and facades.
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