Willseal® Backer Roll

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Willseal® Backer Roll

Secondary Seal for Vertical Applications

Willseal® Backer Roll

Secondary Seal for Vertical Applications

A pre-compressed, self-expanding foam joint seal, engineered to perform as a highly flexible, secondary seal in vertical applications. Willseal Backer Roll is specifically designed to provide the ideal foundation for a large variety of wet sealants, such as silicone, polyurethane, polysulfide, and acrylic.

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Benefits of Using Willseal Backer Roll in Your Next Project

Increased R-Value

Depth of foam can be changed to increase R-value

Seals Small Gaps

Seals gaps and seams as small as 1/8 in.

Fully Compatible

With a variety of Tremco sealants

Lasting Performance

Permanently flexible and not susceptible to breakdowns caused by excessive or rapid joint movement

Easy Application

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

Breathable

Vapor-permeable material

Willseal Backer Roll Is Best For

Secondary expansion and control joints
Secondary construction joints behind a wet seal
Joints in pre-cast concrete, masonry, brick and facades
EIFS

Window and flashing applications
Interior vapor, dust, acoustical and air control

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)