Everflex WPM is a water-based, microfibre-reinforced liquid waterproofing membrane for bathrooms, showers and protected external under-tile areas. It cures to form a flexible waterproof barrier beneath tile, screed or another specified finish.
Use Everflex WPM beneath tiles in suitable bathrooms, showers, balconies, patios, terraces and decks. With Class III to AS 4858:2004 and 391% elongation, it suits waterproofing systems that need a flexible, fully bonded membrane.
WPM is not an exposed or trafficable waterproof coating. It needs a protective finish and should not be used over rising damp or negative hydrostatic pressure without the specified moisture-control system. Substrates must be sound, clean and dry.
For waterproofing that will remain exposed, explore Everflex WPUV, or browse our waterproofing membranes to compare other options for the job.
What waterproofing class is Everflex WPM?
Everflex WPM is Class III to AS 4858:2004, with 391% elongation. It is separately classified Class II to AS 4654.1:2012.
Can I use Everflex WPM on balconies and decks?
Yes, beneath tiles or another specified protective finish on suitable balconies, patios, terraces and decks. Match the complete waterproofing system to the substrate and conditions.
Can Everflex WPM be left exposed?
No. WPM needs a protective finish. It is not an exposed or trafficable membrane.
Can it be used over rising damp?
Not without the specified moisture-control system. Do not use WPM where negative hydrostatic pressure or rising damp is present without the correct preparation and protection.
| Property | Value |
|---|---|
| Product Type | Water-based, microfibre-reinforced liquid waterproofing membrane |
| Consistency | Thick liquid |
| Density | 1.3 g/cm³ |
| AS 4858:2004 Classification | Class III |
| Elongation (AS 4858:2004) | 391% |
| AS 4654.1:2012 Classification | Class II |
| Application Temperature | +10°C to +35°C |
| Service Temperature | -40°C to +80°C |
| Coverage Rate (Internal) | 1.5 L/m² |
| Recoat Time (25°C) | 2–4 hours after touch-dry; within 24 hours. Varies with conditions. |
| Final Drying Time (25°C, 50% RH) | 48 hours; varies with conditions. |
| Water Absorption | 0.75% |
| Water Vapour Transmission | 3.92 g/m²/24 h |
| VOC Content | <1 g/L |
| Crack Bridging | Pass: no fatigue cracking exhibited |
| Clean Up | Water while wet |
| Storage Conditions | Cool, dry conditions between +10°C and +35°C |
| Shelf Life | Minimum 12 months from date of manufacture |
Here are some common examples on where Everflex WPM Class III Under-Tile Waterproofing Membrane used by our customers.
