Plastics often get a bad rap, but many are environmentally friendly. High-density urethane (HDU) and expanded polystyrene (EPS) are prime examples. In fact, over a sign’s life cycle, some plastics are greener than wood. Because HDU and EPS suppliers know having minimal environmental impact is a competitive advantage, they manage their manufacturing processes to reduce waste. Also, many manufacturers use a high percentage of post-consumer recycled materials in their products. Financial and Environmental Benefits of HDU and other Plastic Signage Materials In addition, from a construction, financial, and environmental viewpoint, the new materials offer tremendous advantages. For example, HDU weighs less than wood, yet is longer-lasting and requires virtually no maintenance. Unlike wood, the new plastics are impervious to water and insects.