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

Willseal Coreseal is a lightweight, preformed EVA foam joint sealant designed for watertight, dustproof, and UV-stable performance. This closed-cell system installs without invasive anchoring and accommodates up to ±25% movement, making it ideal for dynamic structural joints. With excellent resistance to water, chemicals, and temperature extremes, Coreseal is suited for bridges, parking decks, and high-movement concrete structures.

Key Features:

Watertight, dustproof, UV- and chemical-resistant seal
Accommodates ±25% joint movement
Non-invasive installation with no mechanical anchors
Resists delamination under thermal and compressive cycling
Available in joint sizes from ½" to 10" (custom sizes on request)
Lightweight and easy to handle

Applications:

Horizontal and vertical expansion joints
Bridge and highway joints
Parking garage and plaza deck joints
Control joints in stadiums and large structures
Below-grade concrete connections

Technical Specifications:

Property	Value
Material	Closed-cell EVA copolymer foam
Movement Capability	±25%
Tensile Strength	74 ± 21 psi
Tear Resistance	13.5 lbf/in ± 20%
Elongation at Break	275% ± 25%
Water Absorption (7 days)	1% max (DIN 53428)
UV Resistance	Pass (DIN 18542)
Temperature Stability	-40°F to 130°F (-40°C to 54°C)
Density	2.3 ± 20%
Color	Gray (Black by request)
Standard Length	6 ft sticks

Frequently Asked Questions:

What is the maximum joint width supported?
Willseal Coreseal is available for joint widths up to 10 inches. Custom sizes are available on request.

Can this be installed in bridges or highway joints?
Yes, Coreseal is suitable for bridge, highway, and heavy-duty expansion joint applications.

Is special equipment required for installation?
No, it installs without mechanical anchors using standard installation techniques for compressible foam seals.

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