Gold Bond XP Fire-Shield Gypsum Board was designed to provide extra protection against mold and mildew compared to standard drywall products. The face paper is folded around the long edges to reinforce and protect the core, and the ends are square-cut and finished smooth. Long edges of the panels are tapered. With PURPLE paper on the face side and heavy, mold- and moisture-resistant, 100% recycled gray paper on the back side, you can count on XP Gypsum Board to help protect your projects from mold. XP Fire-Shield drywall panels consist of a specially treated, fire-resistant, Type X gypsum core to provide additional fire resistance ratings when used in tested systems.