ARDEX WPM 155 Rapid Plus
Description
Product Overview
ARDEX WPM 155 Rapid Plus is a water-based polyurethane-acrylic hybrid waterproofing membrane developed for high-performance undertile waterproofing applications. It is designed for both internal and external use, delivering a flexible, durable waterproof barrier suitable for wet areas, balconies, and tiled environments.
The formulation provides an express drying system, allowing tiling in as little as 4 hours under ideal conditions, significantly reducing downtime on site. It also offers crack isolation properties, protecting against shrinkage and non-structural cracking while maintaining adhesion to a wide range of substrates. ARDEX WPM 155 Rapid Plus is classified as a Class III membrane in accordance with AS/NZS 4858, ensuring compliance for wet area waterproofing systems.
Key Features
- Fast drying – ready to tile in approximately 4 hours
- Water-based polyurethane-acrylic hybrid formulation
- Crack isolation for non-structural movement
- Flexible, durable waterproof membrane
- Class III membrane compliant to AS/NZS 4858
- Suitable for internal and external applications
- Excellent adhesion to a wide range of substrates
- Low VOC and Green Star compliant
Applications
- Internal wet areas including bathrooms and laundries
- Balconies, terraces, and podium decks
- Under tile installations for floors and walls
- Residential and commercial waterproofing systems
- Areas requiring fast turnaround and early tiling
Notes
- Ready to use – no mixing required
- Apply by roller or brush in a minimum of two coats
- Apply second coat at 90° to first coat
- Typical drying time approx. 4 hours before tiling (23°C)
- Ensure correct coverage and film thickness is achieved
- Use STB Tape or equivalent for joints and penetrations
- Not suitable for permanently immersed conditions
Technical Information
Technical Specifications:
| Type | Polyurethane-acrylic hybrid waterproofing membrane |
| Form | Liquid applied (single component) |
| Colour | Blue |
| Coverage (4L) | Approx. 4.6 m² |
| Coverage (15L) | Approx. 17.5 m² |
| Drying Time | Approx. 4 hours at 23°C |
| Application Method | Brush or roller (2 coats minimum) |
| Substrates | Concrete, renders, screeds, fibre cement, plywood, plasterboard |
| Location | Internal and external |
| Standard | AS/NZS 4858 Class III membrane |
| VOC | Approx. 42 g/L |
| Packaging | 5.3kg (≈4L) and 20kg (≈15L) |
This membrane is designed for fast-track waterproofing applications where speed, compliance, and reliability are critical. Its rapid drying and crack isolation performance make it suitable for professional installations requiring minimal downtime and consistent results.
