ARDEX WPM 189 - Shelterbit Duo Combined SBS/APP Bitumen Membrane

Product Description

ARDEX WPM 189 (Shelterbit Duo Mineral Membrane) is a combined APP (Atactic Polypropylene) and SBS (Styrene-Butadine-Styrene) plastomeric type modified bitumen membrane, consisting of a specially formulated bituminous compound of distilled asphalt modified with selected high grade visco-elastic polymers and reinforced with a combined reinforcement (polyester and fibreglass).

Typical Uses:
Used as a multi-layer membrane in horizontal or vertical applications for waterproofing balconies, terraces and roofs. Ardex WPM 189 (Shelterbit Duo Mineral Membrane) is the final layer in the system.


  • BRANZ Appraised (No. 463)
  • 4.5kg/m2 Mineral Coated SBS/APP Bitumen Membrane
  • Excellent resistance to pollutants and aging
  • High flexibility during application at sub-zero temperature with no physical strain
  • Maintains shape stability at high temperatures
  • High resistance to perforation


Type: APP & SBS
Thickness/weight: 4.5kg/m²
Top surface: Slate Chip
Bottom surface: Torch Film
Heat stability: 110˚C
Cold flexibility: -10˚C
Roll size: 1 x 10m
Roll weight: 45kg