National Gypsum has made available Gold Bond brand XP Fire-Rated 5/16-inch Radius Wall for radius applications requiring fire-rated assemblies. The product is used in double-layered construction. A one-hour UL tested assembly can be achieved with two layers, and a two-hour UL tested assembly can be achieved with four layers. The abrasion-resistant PURPLE XP paper protects against mold, mildew and moisture. It scores and snaps easily with no special handling requirements. Tapered edges allow joints to be reinforced with ProForm brand Joint Tape and concealed with ProForm brand Ready Mix or ProForm brand Quick Set Setting Compounds.