Flannery’s Wall Covering Outside Corner is an outside corner trim for FRP (Fiberglass Reinforced Plastic) panels or wall coverings that is to be installed over a new or existing gypsum board. The Outside Corner can be utilized at 90-degree corners where a wall covering is going to run along two adjoining walls. The Wall Covering Outside Corner also has tapeable flanges so that it can be finished to drywall cleanly and the wall covering material can be applied smoothly so the end result looks great.