You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

ARDEX Internal Wet-Area Tiling System

ARDEX WPM 155 Rapid is a water-based, polyurethane-acrylic waterproofing membrane developed for high-performance under-tile waterproofing. When paired with ARDEX STB Tape forms a rapid waterproofing system that can be tiled over after 4 hours.

System Products:

  • Liquid Membrane: ARDEX WPM 155 Rapid
  • ARDEX ST Tape
  • ARDEX X 18
  • ARDEX SE Silicone
  • BAL Micromax2
Key Features

Key Features of ARDEX WPM 155 Rapid: 

  • Tough flexible film
  • Long shelf life
  • Meets Green Building Council of Australia Greenstar requirements IEQ-13, IEQ-11
  • Can be tiled over – good adhesion with ARDEX tile adhesives
  • Excellent adhesion to a wide range of substrates
  • Fast drying
  • Class III Membrane, as per AS/NZS 4858 Wet Area Membranes
Green Tag Certified
Green Tag Certified
Scope of Use

ARDEX under tile liquid membranes have been appraised for use as waterproofing membranes for the internal wet areas of buildings, within the following scope:

  • On floor substrates of concrete, flooring grade particleboard, plywood, compressed fibre cement sheet, and fibre cement sheet underlay, and on wall substrates on concrete, concrete masonry, wet area fibre cement sheet lining systems and wet area plasterboard lining systems;
  • and when protected from physical damage by ceramic or stone tile finishes;
  • and where floors are designed and constructed such that deflections do not exceed 1/360th of the span 
Limitations on Use

Do not use ARDEX WPM 155 Rapid under the following conditions:

  • Areas subject to negative hydrostatic pressure or rising damp, unless treated with ARDEX WPM 300
  • Wet substrates or green screeds/concrete – need to be sealed with one coat ARDEX WPM 300 as described earlier
  • Surface temperatures below 10°C or greater than 35°C
  • Do not expose to prolonged UV conditions

Other Limitations:

  • Not suitable for permanent immersed conditions. For conditions of permanent immersion, it is recommended that ARDEX WPM 002 (Superflex Two Part) is used
  • Must be installed by an approved ARDEX Applicator 
Statement of Building Code Compliance

ARDEX WPM 155 Rapid, assuming use, install and maintenance stated within the ARDEX WPM 155 Rapid Datasheet, will meet the following provisions of the NZBC:

  • Clause B2 Durability: Performance B2.3.1 (b) 15 years
  • Clause E3 Internal Moisture: Performance E2.3.1 and E2.3.2
  • Clause F2 Hazardous Building Materials: Performance F2.3.1
Other Performance Attributes
  • Class III membrane — in accordance with AS4858 requirements
  • Green Star — meets the benchmark for VOC credit in the Green Building Council of Australia’s Rating Tools
  • BRANZ Appraisal (No 472)
  • BRANZ Appraisal (No 473)
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
Data Sheet: ARDEX WPM 155
Data Sheet: Bal Micromax2
Product Info: ARDEX WPM 155 Rapid
Product Info: ARDEX X 18
BRANZ Appraisal 472
BRANZ Appraisal 473
Product Info: ARDEX SE Silicone
Product Info: ARDEX ST Tape
Product Info: BAL Micromax2

ARDEX New Zealand supply and manufacture a range of quality construction materials, including products for levelling floors; external and internal waterproofing; and fixing natural stone and tiles.

Product Enquiries

News from ARDEX

ARDEX Butynol & Butyseal Certified for Use at Pitches of 1:100
NZ Made Waterproofing Membrane Products Used In Heritage Renovation
SystemARDEX Specified for a High-End Apartment Project
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.