Their strong, durable plastics come in a variety of. Webnov 15, 2020 · how did the plastic lumber work for you? I am looking to use the 2x4 and 4x4 material to replace rotting cedar railings. I can't seem to find any reviews on the stuff. Webrecycled hdpe plastic 2×4 boards available in 12 colors. Our plastic wood boards are manufactured with a proprietary closed molecular formula that protects these boards.