RLA WPM is a waterborne, flexible waterproof membrane designed for internal wet areas and under-tile applications. It provides a seamless, highly flexible Class III waterproofing barrier that accommodates expected structural movement while ensuring long-term moisture protection.
This single-component, low VOC membrane is easy to apply by brush, roller, or trowel and forms a tough, elastomeric film once cured. It bonds strongly to concrete, render, cement sheeting, masonry, and other common building substrates when used with the appropriate RLA primers.
Ideal for bathrooms, laundries, and kitchens, RLA WPM delivers dependable performance when used as part of a full RLA waterproofing system.
• Class III flexible membrane for internal wet areas
• Waterborne and low VOC formulation
• Single-component, ready to use
• Excellent adhesion to a wide variety of substrates
• Fast drying and easy to apply
• Fibre-reinforced for added durability
• Compatible with RLA Uniprime and RLA Moisture Seal primers
• Safe and non-toxic formulation
• Designed for use with bond breakers
• Internal wet areas including bathrooms, showers, and laundries
• Walls and floors to be tiled or screeded
• Structural plywood, Villaboard, fibre cement, and plasterboard
• Rendered and pre-cast concrete surfaces
• Masonry, Hebel, and brickwork
• Suitable for residential and commercial projects
• Appearance: Grey viscous liquid
• Type: Waterborne acrylic membrane
• Classification: Class III (AS 4858:2004 compliant)
• Solids content: 60 %
• Specific gravity: 1.14 g/cm³
• Elongation: 500 % at break
• Water vapour transmission: 0.6 g/m²/24 hrs
• Dry film thickness: 1 mm (two coats)
• Recoat time: 2–4 hours @ 23 °C / 50 % RH
• Full cure before tiling: 48 hours
• Coverage: Approx. 1.5 L/m² (two coats)
• Packaging: 15 L pail
• Shelf life: 12 months (unopened, stored in a cool, dry area)
• Application: Brush, roller, or trowel
• Clean-up: Warm soapy water while wet
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