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Box Gutter Expansion Joint

Our “stretch and seal” roof flashing system is ideal for square ducts, chimneys, skylights and more. It joint flashes hi-rib and standing-seam profiles and easily flashes between dissimilar materials with a superior fit and seal. Made with recycled material in the USA, it’s backed with a 20-year manufacturer’s warranty.

Made With Recycled Material
Box Gutter Expansion Joint

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If you need expandable edge strip flashing, go with quality you can trust: Box Gutter Expansion Joint from Marco. It stretches and forms easily to fit and seal, even between dissimilar materials, including brick, fiber cement, galvanized steel, aluminum, stainless steel and concrete. And with our Box Gutter Expansion Joint, vibration and expansion are not a problem. Available in 9” width by 12’, 33’ and 50’ lengths, Box Gutter Expansion Joint comes with a 20-year warranty and the peace of mind you get with all Marco-quality products.

How To Install

Installation is an easy, one-person job.

More Flashing

Learn about our other flashing products featuring Marco-proven performance.


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