$18-$24/m² (3 coats)
Coverage: 1.2 litres/m² (3 coats)
Why we like it: It is a water-based, foot-trafficable membrane with inherent anti-slip properties (Dry Floor Friction Test Class F under AS/NZS 4586) which can eliminate the need to add aggregate during installation.
- Pedestrian traffic podiums
- Roof decks
- Plant room floors
- Swimming pools surrounds
- Trafficable box gutters
- Steps, stairs & pathways
- Water based - safe to use, low odour and easy cleaning
- Hard wearing excellent abrasion resistance properties
- Single component - ready to use, no mixing required
- Green Star meets the benchmark for VOC credit in the Green Building Council of Australia's Rating Tools
- UV resistant - suitable for exposed applications
- Slip resistant formulated to give anti-slip properties
DO NOT USE ARDEX WPM 908 UNDER THE FOLLOWING CONDITIONS:
- Areas subject to negative hydrostatic pressure or rising damp
- Wet substrates or green screeds/concrete need to be sealed with one coat ARDEX WPM 300
- Surface temperatures below 10 deg C or greater than 35 deg C
- As an under tile membrane
VOC Content: 70 g/L (meets Green Star's benchmark for VOC content)
Compliances and Accreditations
- AS 4654.2 – 2009
- Wet pendulum test: Class W
- Wet pendulum test (with Aluminium Oxide Grit No.16) (after 5000 wear cycle): Class V
- Dry floor friction test: Class F
Systems & Installation
Primer: ARDEX WPM 300 (HydrEpoxy) (0.3 mm WFT)
1st coat: ARDEX WPM 908 (0.4 mm WFT)
2nd coat: ARDEX WPM 908 (0.4 mm WFT)
3rd coat: ARDEX WPM 908 (0.4 mm WFT)
Note: ARDEX WPM 908 has been formulated to provide anti-slip properties. For superior anti slip properties, use of alumina grit should be broadcast over the first coat of ARDEX WPM 300 prior to application of ARDEX WPM 908 Trafficable Membrane.
Concrete – the preferred surface texture for concrete floors in preparation for the application of ARDEX products is a wood float finish. Steel trowel finished concrete must be roughened mechanically as necessary to remove laitance and provide a good key for product application. All surfaces must be dry and cleaned free from dirt, grease, oil, curing compounds, loose particulates and other surface contaminants.
Existing membranes or coatings on concrete – all existing membranes, adhesives and other surface coatings shall be removed by mechanical means and the surface treated to open the pores. All surfaces shall then be cleaned free from all loosely bound materials and all other surface contaminants and allowed to dry thoroughly.
Compressed Fibre Cement sheets must be fixed strictly in accordance with the manufacturer’s instructions. Mechanical fixings such as screws shall be countersunk, filled and sanded to a smooth substrate surface finish. All surfaces shall then be sanded to a smooth to plane finish and vacuumed to remove all loose particles. All surfaces should be dry, clean, and free of dust, grease and all loose contaminating materials. Joints between sheets and perimeter joints should be sealed with a neutral cure silicone. For Expansion Joint preparation please refer to Technical Bulletin TB226 available on ardexaustralia.com.
Concrete: Cured for minimum 28 days, wet concrete should be allowed to dry thoroughly or sealed with one coat of ARDEX WPM 300 at coverage rate of 3.0m² per litre.
Renders and screeds: Cured for min 7 days. Wet render should be allowed to dry thoroughly or sealed with one coat of WPM 300 at coverage rate of 3.0m² per litre and allowed to cure overnight. Compressed fibre cement sheets Wet area grades only. PRIMER Prepared substrates must be primed with ARDEX WPM 300 (HydrEpoxy) prior to the application of ARDEX WPM 908 Trafficable Membrane.
Apply ARDEX WPM 908 with a brush or paint roller. Stir ARDEX WPM 908 thoroughly prior to each application. Apply at a wet film thickness rate of 400μm per coat (three coat system) to ensure full coverage with brush or roller. Apply ARDEX WPM 908 at a minimum of three coats ensuring a uniform coverage is achieved at an approximate wet film thickness of 0.4mm per coat to achieve an overall dry film thickness of 0.6mm. Anti slip properties may be enhanced on application by using a textured roller.
ARDEX WPM 908 has been formulated to provide anti-slip properties. For superior anti slip properties, use of alumina grit is recommended. This should be broadcast over the first coat of ARDEX WPM 300 prior to application of ARDEX WPM 908 Trafficable Membrane.
1) Prime Coat ARDEX WPM 300 (WFT) 0.3mm
2) First Coat ARDEX WPM 908 (WFT) 0.4mm
3) Second Coat ARDEX WPM 908 (WFT) 0.4mm
4) Third Coat ARDEX WPM 908 (WFT) 0.4mm
Approximately 12.5 m2 per pail (three coat system).
Recoat time is 2–4 hours in between first and second coats. Drying time on flat surfaces under standard conditions is around 4 hours. However, dry through time will be slowest in areas where ARDEX WPM 908 is applied over silicone bond breaker, or is reinforced. Make sure these areas are dry. In some cases, this can vary from 24 hours to 48 hours. Full cure of the product is 3 days after application at 23°C. Drying times will vary depending on humidity, surface temperature and porosity of substrates.
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ARDEX WPM 908Water Based Trafficable Acrylic Membrane for External Areas