Project Source 10-ft x 100-ft Black 6-mil Construction Film (Professional (6+ Mil)Our 6 mil plastic sheeting is a general purpose plastic film for use in a variety of construction, gardening and DIY applications. This heavy duty plastic is commonly used under concrete slabs as a vapor barrier, on top of freshly poured slabs as a curing blanket, and as a temporary cover for equipment and supplies. Heavy duty plastic sheeting Advanced tear and puncture resistant multi layer polyethylene Tear and puncture resistant Perfect for heavy