New Wood-Plastic Composite (WPC). Interior & Exterior Decking, Fencing, Siding Boards, Pallets, etc. Classy textures & colors. United Material WPC: ♦ Decking Boards | ♦ Siding Boards | ♦ Fencing Boards | ♦ Pallets | ♦ Accessories Wood-Plastic Composite, our brand name United Material WPC, is mainly used for outdoor side walls, outdoor louvers, terraces, fencing, stairs, pallets and accessories. ...