WPC decking is a form of synthetic decking for outdoor use. It is made from wood-plastic composites, which are manufactured by mixing wood particles with polypropylene. WPC products are mainly used outdoors. Wood plastic composite is a fantastic product that can be used for many applications. This article will focus on the use of WPC decking and how it can be used to add value to your home. Composite wood strips are heated up and mixed with different kinds of plastic like polystyrene or polyethylene.