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.
