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Everflex WPM: A Technical Overview
Everflex WPM is a premium, fibre-reinforced, waterborne waterproof membrane developed for Class 3 under-tile and exposed applications. With high elongation, tensile strength, and excellent crack-bridging ability, it delivers a seamless, elastic barrier that resists ponding, mould, and UV degradation. Its fast-drying formulation enables quick recoat and tile-over times, making it a preferred choice for professional applicators needing speed without sacrificing quality.
Core Features & Specifications
- Class 3 membrane (high elongation) compliant with AS4858 & AS4654.1
- Microfibre-reinforced for excellent tensile strength and durability
- Flexible, seamless, and fully bonded membrane system
- Resistant to ponding water, mould growth, and UV exposure
- Tileable in 24–48 hours under correct curing conditions
- Water-based, non-toxic, and low in VOCs (less than 13g/L)
- Suitable for interior and exterior use, vertical or horizontal surfaces
Why Everflex WPM is Trusted by Professionals
- Quick recoat and over-tiling times reduce project delays
- Remains flexible after curing — does not crack or peel with substrate movement
- Safe to use in sensitive areas such as bathrooms, kitchens, and below-grade spaces
- Bonds well to concrete, fibre cement, plasterboard, masonry, and treated timber
- Easy water clean-up for tools and spills (when wet)
Best Practices: Do's & Don'ts
Do
- Apply using brush, roller, or spray in a minimum of two coats
- Reinforce with bond breaker at all wall/floor junctions and penetrations
- Allow curing time between coats and prior to tiling
- Check film thickness using a wet film gauge for Class 3 compliance
Don't
- Do not apply over damp or contaminated substrates
- Do not use in continuously submerged environments (e.g. pools)
- Do not tile until the membrane is fully cured
- Do not dilute or mix with other compounds
Real-World Use: Trade Scenarios
For Tilers: Bathroom Renovation Membrane
The Engineering Challenge
Membrane needs to bridge cracks, seal junctions, and remain tileable in under 48 hours to keep the reno on schedule.
The System-Based Solution
Apply two coats of Everflex WPM with a bond breaker at junctions. Ensure minimum 1.2mm dry film thickness for Class 3 rating.
Best Practice Note
Use wet film gauge to confirm each coat achieves 0.6mm wet thickness. Allow minimum 6 hours between coats at 20°C.
For Builders: External Decks & Balconies
The Engineering Challenge
Deck membrane must resist UV, ponding water, and be compatible with tile adhesives.
The System-Based Solution
Apply primer if required, followed by two coats of Everflex WPM. Allow full cure before tiling with flexible adhesive.
Best Practice Note
Protect freshly applied membrane from weather using tarps or plastic sheeting if rain is forecast.
Performance Benchmark: Everflex WPM vs. Standard Membranes
| Metric | Everflex WPM | Standard Membrane | Advantage |
|---|---|---|---|
| AS4858/AS4654.1 Compliance | Yes | Often Unspecified | Certified waterproofing system |
| Dry Film Flexibility | High (Class 3) | Moderate (Class 2) | Better crack-bridging and substrate movement tolerance |
| VOC Content | <13g/L Low-VOC | Higher VOCs (solvent-based) | Safer and more environmentally friendly |
| Cure to Tile Time | 24–48 hours | 48–72 hours | Faster project turnaround |
Frequently Asked Questions
Can I tile directly over Everflex WPM?
Yes. Once fully cured (typically 24–48 hours depending on temperature and humidity), Everflex WPM can be tiled over using suitable polymer-modified tile adhesives.
Is Everflex WPM suitable for external areas like balconies or decks?
Yes. Everflex WPM is UV stable and designed for both internal and external use, including balconies, decks, and podium levels.
How many coats are required for Class 3 compliance?
At least two coats are required. Total dry film thickness should be ≥1.2mm. Use a wet film gauge to ensure each coat is applied at ~0.6mm wet thickness.
Can it be used below ground level?
Yes. Everflex WPM can be used for waterproofing retaining walls and other below-grade applications, provided it's covered by protective boards or drainage layers.
Is a primer required before applying Everflex WPM?
Priming is recommended on porous or dusty surfaces using Everflex Primer or an acrylic-compatible primer. Dense substrates may not require priming if clean and dry.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Internal wet areas (bathrooms, laundries, showers) | Class 3 flexibility ensures movement protection and compliant waterproofing under tiles | Tilers, Waterproofers, Bathroom Renovators |
| Balconies and exposed decks | UV-resistant membrane forms a durable external waterproof layer prior to tiling or overlay | Builders, Waterproofing Contractors |
| Retaining walls and below-grade waterproofing | Protects against ground moisture and hydrostatic pressure when correctly installed and backfilled | Landscapers, Foundation Specialists |
| Planter boxes | Seamless, root-resistant membrane helps prevent leakage and root intrusion into structures | Green Roof Installers, Structural Landscapers |
| General under-tile waterproofing | Compatible with most tile adhesives and levelling compounds | Tilers, Renovation Builders |
Applying Everflex WPM: Step-by-Step Installation
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1. Prepare the Substrate
Ensure all surfaces are dry, clean, and structurally sound. Remove dust, grease, oils, curing compounds, and laitance. Use a primer if recommended based on the substrate.
Tip: Use a moisture meter to confirm dryness on concrete or render before coating. -
2. Treat Junctions and Penetrations
Apply bond breaker (such as neutral cure silicone or polyester tape) at all wall-floor junctions, expansion joints, and around penetrations. Coat over bond breaker with membrane to form a reinforced flexible joint.
Tip: Do not stretch or compress bond breaker tape — apply with light pressure only. -
3. Apply the First Coat
Apply Everflex WPM using a brush, roller, or airless spray. Coat evenly at a wet film thickness of approximately 0.6mm to achieve the required dry film thickness after curing.
Dry Time: Allow 4–6 hours curing before recoating. -
4. Apply the Second Coat
Apply in the opposite direction to the first coat (e.g. crosshatch method) to ensure full coverage and correct film build. Check total dry film thickness is ≥1.2mm to meet Class 3 standard.
Pro Tip: Use a wet film gauge to check uniformity during application. -
5. Allow Full Cure
Protect from moisture and foot traffic while curing. Full cure typically occurs in 24–48 hours depending on conditions (temperature, humidity, and airflow).
Cure Time: 24–48 hours before tiling or overlaying.
Limitations & Safety
Product Limitations
Not designed for areas subject to continuous immersion, such as swimming pools or ponds.
Do not apply over wet, frozen, or contaminated substrates.
Do not tile or overlay until full cure has been achieved (24–48 hours minimum).
Not recommended for use without proper reinforcement at junctions or penetrations.
Safety & Handling Requirements
Personal Protective Equipment
Wear gloves, protective eyewear, and suitable clothing during application. Wash hands thoroughly after use.
Ventilation
Use in well-ventilated areas. Avoid inhaling vapours in enclosed spaces.
Storage & Handling
Store in original sealed container below 30°C. Do not allow product to freeze. Keep away from children.
Emergency First Aid
Eyes:
Flush immediately with clean water for at least 15 minutes. Seek medical advice if irritation persists.
Skin:
Wash with soap and water. Remove contaminated clothing.
Inhalation:
Move to fresh air. If symptoms occur, seek medical attention.
Ingestion:
Rinse mouth. Do not induce vomiting. Seek medical assistance immediately.
Refer to the Safety Data Sheet (SDS) for full handling and disposal instructions.
Everflex WPM Application Guide
Concrete & Screeds
Surface Preparation
Cure for at least 7 days. Remove laitance, dust, and contaminants. Surface must be dry and structurally sound.
Primer recommended
Prime with acrylic-compatible primer or dilute first coat of membrane 1:1 with water.
Compressed Fibre Cement Sheets
Surface Preparation
Ensure sheets are fixed to manufacturer instructions. Wipe down surface and clean joints before application.
No primer typically required
Apply directly onto clean surface. Prime only if surface is dusty or porous.
Plasterboard & Villaboard®
Surface Preparation
Ensure boards are securely fastened. Fill joints with suitable compound and tape over for movement resistance.
Primer optional
Prime in high humidity zones or if surface is powdery.
Timber (Treated Plywood or Particleboard)
Surface Preparation
Must be exterior grade and sealed underneath. Securely fix with no movement. Sand lightly before priming.
Primer required
Prime with water-based timber-compatible primer before membrane application.
Masonry & Rendered Surfaces
Surface Preparation
Allow render to cure for 7 days. Clean thoroughly and ensure the surface is dry and firm.
Primer recommended
Prime with acrylic-compatible primer or thinned membrane for better adhesion and sealing.
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