Heavy Duty 6 Mil Polyethylene 600 Square Feet of Coverage Clear - Allows Light to Pass Through Works as a Temporary Cover or Vapor Barrier Ideal for Construction or DIY Projects Rocky Mountain Goods 6 MIL Clear Plastic Sheeting is suitable for construction and DIY projects. It is made of premium-quality polyethylene to ensure long-term use. This sheeting can be used as a temporary cover for equipment and supplies. You can also create a vapor barrier or cover crawl spaces thanks to its multipurpose design.