A film is provided, including 10 to 20 weight percent of a thermoplastic elastomer, preferably a chlorinated polyethylene, 10 to 20 weight percent of a thermoplastic that is a chlorine-based plastic, less than 15 weight percent of a modifier that imparts predetermined mechanical properties to the film, and 20 weight percent or less of a nondiffusing plasticizer, less than 40 wt % of a filler and 20 wt % or less of a flame-inhibiting material.