Do you know the difference between polyethylene sheeting , poly film and/or plastic sheeting? Of course you do- Polyethylene sheeting is another name for poly film, plastic sheeting, poly liner, "visqueen", plastic film, containment plastic, vapor barrier, geomembrane, green house plastic, and plastic film. Polyethylene or polythene is the most common plastic. As of 2017, over 100 million tons of polyethylene resins are produced annually, accounting for 34% of the total plastics market. Its primary use is in packaging(plastic bags, plastic films, geomembranes, containers including bottles, etc.). Many kinds of polyethylene are known, with most having the chemical formula (C2H4)n.