Poly Sheeting Poly sheeting is used in multiple industries by companies and individuals around the world. It can be used as a simple pallet cover or as cover to protect your material from a leaky roof. Polyethylene is the most common form of plastic used in a variety of packaging, industrial, and construction materials. Polyethylene comes in a variety of densities; poly sheeting is commonly made from a low-density polyethylene. Poly sheeting has many applications