The non-combustible gypsum core of USG Sheetrock® Brand Gypsum Liner Panels is covered in moisture-resistant, 100 percent recycled green face and back paper. The panels have double beveled edges for simple installation and are UL/ULC Classified for fire resistance (Type SLX). 

With USG Sheetrock® Brand Shaft Wall and Area Separation Wall Systems framing components, USG Sheetrock® Brand Gypsum Liner Panels have been evaluated for fire resistance, structural integrity, and acoustical performance. Shaft Wall and Area Separation Wall System components from the USG Sheetrock® Brand guarantee optimum system performance and safety when used together. If other system parts are utilized with USG Sheetrock® Brand Liner Panels, the manufacturer(s) of the replacement part(s) should be contacted to verify the performance characteristics of the system.