The 3-layer 150 µ Coexdalle is a film made of low density coextruded polyethylene. Thanks to its 3-layer technology, it is highly resistant. It is rotproof and waterproof. The 3-layer Coexdalle 150 µ is used as a concrete sub floor film. It is in accordance with the ITBTP norm n. 482 issued in April 1990 and with the DTU 13.3. It must be installed before making the concrete screed. It is puncture resistant and it obstructs humidity rising.