H2O Supplies

ARDEX WPM 300 – Water-Based Epoxy Moisture Barrier

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$599.95 AUD
Sale price
$599.95 AUD
Regular price

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ARDEX WPM 300 is a two-component, water-based epoxy moisture barrier designed to control rising damp, water vapour transmission, and hydrostatic moisture pressure in concrete and masonry substrates. It is suitable for use on damp surfaces and green concrete, making it a reliable solution where moisture levels exceed acceptable limits prior to flooring, waterproofing, or coating systems.

The product can be applied as a primer, moisture barrier, or negative-side waterproofing coating, with two coats providing a low water vapour transmission rate suitable for compliance with relevant Australian Standards for damp substrates. When installed correctly, ARDEX WPM 300 helps prevent efflorescence, adhesive failure, and membrane delamination caused by residual moisture.

ARDEX WPM 300 is compliant with AS/NZS 4020 for potable drinking water and is suitable for use in tanking and containment applications. It is commonly specified beneath ARDEX liquid-applied membranes, levelling compounds, tile adhesives, and floor finishes where moisture management is critical.

• Water-based two-part epoxy moisture barrier
• Suitable for damp surfaces and green concrete
• Resists rising damp and efflorescence
• Withstands hydrostatic pressure up to 250 kPa
• Low water vapour transmission rate
• Potable drinking water compliant to AS/NZS 4020
• Can be used as primer or standalone barrier

• Damp or green concrete slabs
• Negative-side waterproofing applications
• Moisture barrier under flooring systems
• Primer beneath waterproofing membranes
• Tanking and potable water containment
• Walls and floors subject to hydrostatic pressure

• Two-component water-based epoxy coating
• Mixing ratio 1:1 by volume
• Coverage 3.0 m²/L per coat
• Two coats required for moisture barrier performance
• Dry film thickness 0.3 mm total
• Moisture vapour transmission <10 g/m²/24 hrs
• Hydrostatic pressure resistance 250 kPa
• Recoat time approximately 4 hours at 25°C
• Minimum cure before overcoating 24 hours
• Colours available grey or black

  • ardex wpm 300
  • australian standards waterproofing
  • damp concrete primer
  • epoxy moisture barrier
  • flooring moisture barrier
  • green slab seal
  • hydrostatic pressure coating
  • moisture vapour barrier
  • negative side waterproofing
  • rising damp barrier
  • waterproofing primer
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