Tremco Willseal Coreseal

Willseal Coreseal is a lightweight, preformed closed-cell ethylene vinyl acetate (EVA) copolymer foam. It is designed to provide a watertight, airtight primary seal that does not require invasive anchoring for installation. Willseal Coreseal is engineered to perform in both horizontal and vertical applications and is capable of +/- 25% movement from the mean joint size.

Dust-Proof
Airtight
Noise-Reducing

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SKU

22397

Tremco Willseal Coreseal - Flexible Closed-Cell Foam Sealant

Tremco Willseal Coreseal is a lightweight, preformed closed-cell ethylene vinyl acetate (EVA) copolymer foam sealant designed to provide a watertight, dust-proof, airtight, noise-reducing, thermally insulating, and UV-stable seal. Engineered for both horizontal and vertical applications, Willseal Coreseal delivers exceptional performance in expansion and control joints, including those found in parking structures, bridges, and plaza decks. With its ability to accommodate up to 50% joint movement (±25%), this durable, compressible system ensures reliable protection for demanding environments.

Key Features:

Monolithic construction prevents delamination
Accommodates up to ±25% movement
UV and chemical-resistant for long-term durability
Watertight seal with low water absorption (1% max over 7 days)
Non-invasive anchoring simplifies installation
Lightweight and thermally insulating for superior performance

Applications:

Horizontal and vertical expansion joints
Control joints in parking garages, bridges, and plaza decks
Below-grade connections
Stadium and highway longitudinal joints
Primary and secondary seals in industrial and commercial applications

Technical Specifications:

Specification	Details
Material	Closed-cell EVA copolymer foam
Movement Range	±25%
Temperature Stability	-40°F to 130°F (-40°C to 54°C)
Tensile Strength	74 ± 21 psi
Tear Resistance	13.5 ± 20% lbf/in
Elongation at Break	275 ± 25%
Water Absorption	1% max over 7 days

Frequently Asked Questions:

What joint sizes are available for Willseal Coreseal?
Willseal Coreseal is available in sizes ranging from ½” to 10” in 6 ft lengths. Custom sizes can be requested.

Can Willseal Coreseal be used in below-grade applications?
Yes, Willseal Coreseal is suitable for below-grade connections, providing a watertight seal in challenging environments.

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