DAMPFIX® WPM UNDERTILE
One component water-based polyurethane, Class 3 waterproofing membrane
Product overview
Dampfix WPM Under Tile is a one-component, water-based polyurethane waterproofing membrane reinforced with clump-free fibres, made in Australia, formulated to waterproof internal wet areas and external balconies, rooftops and podium decks ahead of tiling. It won't re-emulsify once cured, giving a durable membrane that holds up under ongoing wet conditions long after installation.
Fast recoat times and next-day tiling keep trades moving on wet area jobs, making Dampfix WPM Under Tile a trusted choice among tilers and waterproofers for its Class 3 elasticity and direct compatibility with approved Bostik tile adhesives.
Why choose Dampfix WPM Under Tile?
Dampfix WPM Under Tile is a water-based, non-flammable Class 3 high-elasticity membrane with ≥600% elongation, passes 2mm crack bridging, and offers high resistance to detergents and bleach. It complies with AS 4858:2004, AS 4654.1:2012, AS/NZS 3740 and AS 4654.2.
Where to use it
Dampfix WPM Under Tile waterproofs concrete and cement-rendered masonry, FC sheeting, water-resistant plasterboard, structural plywood (Type A Stamped), and sand and cement screeds or polymer-modified renders. Apply by brush, roller or trowel. Use Bostik Multiprime A530 on porous substrates or Bostik N40 Primer on non-porous substrates such as uPVC, brass or copper, then tile directly using approved Bostik adhesives.
TIP: Working on an external deck over an unbonded screed that needs extra elongation? Reach for Dampfix PU.
Fast recoat times and next-day tiling keep trades moving on wet area jobs, making Dampfix WPM Under Tile a trusted choice among tilers and waterproofers for its Class 3 elasticity and direct compatibility with approved Bostik tile adhesives.
Why choose Dampfix WPM Under Tile?
Dampfix WPM Under Tile is a water-based, non-flammable Class 3 high-elasticity membrane with ≥600% elongation, passes 2mm crack bridging, and offers high resistance to detergents and bleach. It complies with AS 4858:2004, AS 4654.1:2012, AS/NZS 3740 and AS 4654.2.
Where to use it
Dampfix WPM Under Tile waterproofs concrete and cement-rendered masonry, FC sheeting, water-resistant plasterboard, structural plywood (Type A Stamped), and sand and cement screeds or polymer-modified renders. Apply by brush, roller or trowel. Use Bostik Multiprime A530 on porous substrates or Bostik N40 Primer on non-porous substrates such as uPVC, brass or copper, then tile directly using approved Bostik adhesives.
TIP: Working on an external deck over an unbonded screed that needs extra elongation? Reach for Dampfix PU.
Geographic availability
- Australia
Smart Advantages
Won't re-emulsify once cured, for lasting wet area durability
Class 3 high-elasticity membrane with ≥600% elongation
Fast recoat time (1–2 hours), tileable the next day
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TDS
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ABOUT DAMPFIX WPM UNDERTILE
- 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
RECOMMENDED USES
- 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.
