The Tego T20-1206B polyethylene vapor barrier film measures 12 feet wide by 100 feet long with a 6 mil thickness, covering up to 1,200 square feet. This heavy-duty film creates a moisture barrier between concrete subfloors and laminate or engineered wood flooring, helping prevent warping and mold. Still in original packaging with no signs of use. An economical and effective solution for large flooring projects. Compatible with most laminate and floating floor installations.