Plastic lumber (PL) is a plastic form of lumber (timber) made of virgin or recycled plastic (in which case it can be called RPL). It is made of 100% plastic, compared with wood-plastic composite lumber. Plastic lumber (PL) is a plastic form of lumber (timber) made of virgin or recycled plastic (in which case it can be called RPL). It is made of 100% plastic, compared with wood-plastic composite lumber. Widely employed in outdoor decking, it is also used for molding and trim and garden furniture such as park benches. Resistant to cracking and splitting when appropriately installed, plastic lumber can be molded with or without simulated wood grain details. Even with a wood grain design, PL is still easy to distinguish visually from natural timber: the grains are the same uniform color as the rest of the material.