Willseal 600 Foam | Breathable Pre-Compressed Joint Seal for Vertical Applications
The Willseal 600 Foam is a high-performance, pre-compressed polyurethane joint seal designed for vertical expansion and control joints. Engineered to deliver superior weather protection, vapor permeability, and UV stability, this foam seal maintains long-lasting flexibility while accommodating joint movement up to ±50%. Its lightweight, elastic construction provides a weather-tight seal for diverse exterior applications, including masonry, facades, and panelized building systems.
Key Benefits of Willseal 600 Foam
- Breathable and vapor-permeable while maintaining a weather-tight seal
- UV-stable construction remains flexible throughout the lifetime of the seal
- Accommodates ±50% joint movement for dynamic building conditions
- Available in rolls and sticks, with optional PSA treatment for easy installation
- No mixing, priming, or masking required, reducing labor and material costs
- Maintains performance across varying temperatures and weather conditions
- Enhances energy efficiency by improving R-value where applied
Common Applications
Willseal 600 Foam is ideal for primary expansion and control joints, joints in pre-cast concrete, masonry, brick, and facades, EIFS systems, starter track assemblies in panelization, windows and walls, and interior vapor, dust, and air control. Its flexibility and breathability make it suitable for both new construction and retrofit projects.
Packaging and Performance
Delivered pre-compressed in both roll and stick formats, Willseal 600 minimizes on-site preparation and simplifies installation. The foam’s vapor-permeable yet weather-resistant structure ensures dependable, long-term sealing for critical joint applications.
Product Properties
| Property | Value |
|---|---|
| ASTM C518: Thermal Conductivity | 0.28 to 0.30 Btu-in/hr-ft²-°F |
| ASTM D3574: Ultimate Elongation | 120% ± 20% |
| Foam Color | Black |
| Storage Temperature | 68 °F (20 °C) |
| Temperature Stability | Short term: -40 to 248 °F (-40 to 120 °C) | Long term: -40 to 194 °F (-40 to 90 °C) |
For a silicone-coated vertical seal alternative, see the Willseal Color Coreseal V. More Tremco sealing solutions are available at TremcoSealants.com.
