CGC Sheetrock Brand UltraLight Panel Firecode X is made with an innovative engineered composite design which makes it the industry's first and lightest Type X gypsum panel. These panels have been formulated to achieve all of the strength and performance characteristics of standard 5/8 inch gypsum panels, at a significantly reduced weight. This is the perfect product to finish interior walls and ceilings that require additional fire-resistance over regular gypsum board. They are easy to cut and install quickly, permitting painting or other decorative finishing. Use in commercial, residential, and repair and remodel construction For interior applications Intended for fire-rated applications Offers comparable sound, strength and impact resistance to standard 5/8 inch Type X Tapered Edges for Easy Installation and Finishing