CAG Builders Film Black 200um 50mCA Group polyethylene builder's film, 200 m thickness, 50 m length. Black polyethylene concrete underlay for creating a vapour barrier beneath slabs. High strength construction that complies with AS 2870, AS 2904, and the Builders Code of Australia. Available in medium impact, 50 m length, 2 and 4 m width. Due to availability of supply, a Vespol or Supacon direct equivalent may be provided instead.