Poly-Wood®'s lumber is made from high-density polyethylene (HDPE), UV-inhibited pigment systems, foaming compounds, and selected process additives. The HDPE primary raw material is derived from post-consumer bottle waste, such as milk and detergent bottles or other HDPE post industrial material. This material is cleaned by a decontamination process to a high purity level, which removes contaminants such as food residue, paper, and adhesives. It is then compounded into a rigid board stock material; with the resulting finished product containing over 90% recycled plastic by weight.