ARDEX WPM 120 - Bitumen Base/Mid-layer Membrane

Product Description

ARDEX WPM 120 is a 2.5mm APP (Atactic Polypropylene) plastomeric-type modified bitumen waterproofing membrane for use as the mid- or base-layer in a multi-layer bituminous roofing system.

ARDEX WPM 120 consists of a specially formulated bituminous compound of distilled asphalt modified with selected high-grade visco-elastic polymers and reinforced with a combined reinforcement carrier. ARDEX WPM 120 is coated with a sanded top surface finish, while the bottom surface is embossed and protected by a heat sensitive polythene film.


  • Excellent cold flexibility to -5ºC
  • Excellent elongation
  • Heat welded laps provide homogenous join
  • Prefabricated membrane
  • Good elastic memory
  • Combined reinforcement carrier
  • High mechanical characteristics
  • High puncture resistance
  • Good elongation
  • Will not decay



ARDEX WPM 120 is used as a base and or mid-layer in multi-layer membrane systems in horizontal or vertical applications for waterproofing balconies, terraces and roofs. ARDEX WPM 120 membrane must be protected from UV.



  • Structural or marine plywood
  • Concrete
  • Strandsarking