Repurposed Materials markets tarps made from recycled advertising billboard vinyls. They can be used to cover all manner of items in a garden center or nursery, or they can be used as floor covering. In addition to being a “green” tarp alternative, they are also cheap and effective. These waterproof vinyls are super, heavy duty (20 mils thick and 13 oz/yd material), and they’re a heavier material than most tarps you would buy elsewhere.