Tremco Willseal 600 - Breathable, Flexible Vertical Joint Sealant

Tremco Willseal 600 is a pre-compressed, self-expanding foam joint seal designed for primary vertical sealing applications. Made from high-density polyurethane foam impregnated with hydrophobic acrylic resin, Willseal 600 creates a vapor-permeable, weather-tight seal with exceptional flexibility. It is perfect for exterior and interior applications, such as expansion, control, and isolation joints, providing long-term performance in challenging environments. With easy installation and no mixing or priming required, Willseal 600 ensures reliable sealing for a wide range of construction and architectural projects.

Key Features:

• Breathable and vapor-permeable for superior performance
• Hydrophobic and UV stable for long-term durability
• Pre-compressed and self-expanding for easy installation
• Resistant to weather, wind-driven rain, and environmental factors
• Compatible with a variety of Tremco sealants and substrates
• Meets fire safety standards with Class A flame spread and smoke development ratings

Applications:

• Expansion, control, isolation, and retrofit joints
• Vertical joints in precast concrete, masonry, and facades
• Exterior insulation finish systems (EIFS)
• Window wall starter track assemblies
• Interior vapor, acoustical, dust, and air control

Technical Specifications:

Frequently Asked Questions:

Is Willseal 600 suitable for below-grade applications?
No, Willseal 600 is not designed for below-grade applications. Contact Tremco for alternative products.

Can Willseal 600 be customized for specific joint sizes?
Yes, custom sizes are available upon request through authorized distributors or Tremco representatives.