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One component water-based polyurethane, Class 3 waterproofing membrane
Product overview
Dampfix WPM Undertile waterproofing membrane is a 2-coat system, to be applied over primed porous and non-porous substrates. It is specifically formulated for application on graded substrates that provide positive falls to drainage outlets. Overlaying tiling systems must comply with Guide to the Installation of Ceramic Tiles – AS 3958.1. 
Geographic availability
  • Australia

Smart Advantages

Easy to apply
Reinforced with clump-free fibres
Tile next day in most conditions


  • Easy to apply
  • Class 3, high elasticity
  • Recoat in 1-2 hours @ 23°C & 50% RH
  • Tile next day in most conditions
  • Tiled directly with approved Bostik adhesives
  • Reinforced with clump free fibres
  • No mixing required
  • High resistance to detergents & bleach
  • Will not re-emulsify after curing
  • Does not embrittle with age
  • Excellent adhesion to concrete; rendered masonry; wet area plasterboard; FC sheet & plywood
  • Brush, roller or trowel applied
  • Waterproofing membrane for most jobs


  • As a waterproofing membrane under tile to internal wet area shower, bathroom, kitchen, laundry & toilet areas when installed to AS/NZ 3740.
  • As a waterproofing membrane under tile or other wearing surface systems to external balconies, rooftops & podium levels when installed to AS/NZ 4654.2.
  • Suitable for concrete; cement rendered masonry; FC sheeting; water resistant plasterboard; and structural plywood (Type A Stamped “PAA JAS-ANZ” to AS/NZS 2269-2004) substrates.