Willseal® 600

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Willseal® 600

Breathable Primary Seal for Vertical Applications

Willseal® 600

Breathable Primary Seal for Vertical Applications

A pre-compressed, self-expanding foam joint seal, engineered to perform as a highly-flexible, weathertight, primary seal in vertical exterior applications with a movement capability of ± 50%. The high-density polyurethane foam self-expands to fill the joint creating an elastic, vapor-permeable, weathertight seal.

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Benefits of Using Willseal 600 in Your Next Project

Increased R-Value

Depth of foam can be changed to increase R-value

Lasting Durability

UV-stable and remains permanently flexible for lifetime of seal

Easy Application

Available in both sticks and rolls that are treated with a pressure-sensitive adhesive (PSA) on one side for ease of installation; no mixing, masking or priming required

Multi-Use

Use in various weather and temperature conditions

Willseal 600 Is Best For

Primary expansion and control joints
Joints in pre-caste concrete, masonry, brick and facades
EIFS
Interior vapor, dust and air control

Starter track assemblies in panelization, windows and walls

Product Properties

ASTM C518: Thermal Conductivity	0.28 to 0.30 Btu·in/hr·°F·ft²
ASTM D3574: Ultimate Elongation	120% ± 20%
Foam Color	Black
Storage Temperature	68 °F (34 °C)
Temperature Stability	Short term: -40 to 248 °F (-40 to 120 °C) \| Long term: -40 to 194 °F (-40 to 90 °C)