The GSE Black Top Flashing Joiner Junction (ART100039) is an essential, adjustable weatherproofing component engineered exclusively for GSE portrait in-roof solar PV systems. This heavy-duty joining strip connects top flashing sections together, providing a secure, 100% watertight seal across the upper perimeter of your building-integrated (BIPV) solar array.

Designed for quick installation and universal alignment, this durable black junction ensures a flush, low-profile finish that blends seamlessly with your roofline and modern dark solar frames.