GlasRoc® Sheathing is a high performance, water resistant, gypsum-based exterior sheathing.

GlasRoc Sheathing offers a patented technology of a high performance polymer coating on reinforcing glass mat facers. This unique coating provides a superior water and UV resistant surface for long term protection to weather exposures.

The “paperless” glass mat facers are embedded into a water resistant gypsum core, and positioned beneath a polymer modified gypsum surface.