Plastic sheeting covers is a general term that is a catch all phrase for many terms in the industry.  Plastic sheeting's other names are liners, vapor barriers, vapor retarders, films, polyethylene sheeting. poly sheeting, visqueen, plastic film, reinforced plastic, self-adhesive films, tarps, root barriers, underlayments, greenhouse films, plastic covering, and so on. Plastic sheeting is often made from polyethylene film as its main ingredient.  Other additives can be added to it.