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Everflex WBP is a concrete-compatible, water-based acrylic polymer emulsion formulated to prepare porous substrates for high-performance waterproofing membranes. By penetrating deep into surfaces like concrete, render, and fibre cement sheeting, it effectively beds down residual dust and stabilizes friable layers to prevent subsequent membrane bubbling or lifting.
This low-VOC sealer meets Green Star environmental criteria, making it suitable for high-density residential or commercial internal wet areas where air quality and strict compliance are required. Contractors must ensure the substrate is clean and dry before applying at a rate of 4sqm/L to achieve a continuous seal that maintains watertight integrity.
Application should be avoided on non-porous surfaces such as metal, glazed tiles, or polished concrete to prevent adhesion failure.
Frequently Asked Questions
What surfaces can I use Everflex WBP on?
Everflex WBP is suitable for porous internal substrates such as concrete, fibre cement sheeting, cement render, and masonry surfaces.
Is Everflex WBP compatible with all waterproofing membranes?
It is specifically formulated to improve the bond of Adheseal waterproofing membranes and is also compatible with most acrylic membrane systems.
Can I use Everflex WBP outdoors?
Everflex WBP is intended for internal use only. For external porous surfaces, consider using a different primer such as Everflex VBS or Primer 2001.
Do I need to dilute Everflex WBP before use?
No dilution is required. Use as supplied unless directed by Adheseal technical support.
How long should I wait before applying the waterproofing membrane?
Allow the primer to fully dry — typically 30 minutes at 25°C. Ensure surface is tack-free before membrane application.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Priming internal concrete slabs before waterproofing | Seals dust and porosity to ensure proper membrane adhesion | Waterproofers, Builders |
| Treating FC sheet or cement wall lining in bathrooms | Improves coverage and bonding of internal waterproofing membranes | Tilers, Renovation Contractors |
| Under membrane in laundries, kitchens, or plant rooms | Enhances waterproofing performance in high-moisture internal zones | Facility Maintenance, Commercial Fit-Out Teams |
| Stabilising cement renders and screeds prior to coating | Reduces absorbency and evens substrate profile for waterproofing systems | Renderers, Waterproofing Applicators |
| Substrate preparation in Green Star or eco-certified projects | Low VOC and environmentally compliant for sustainable construction | Green Builders, Specifiers, Architects |
How to Apply Everflex WBP: Step-by-Step
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1. Prepare the Surface
Ensure the substrate is clean, dry, and free from dust, grease, curing agents, or laitance. Vacuum or sweep thoroughly.
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2. Mix if Settled
If separation has occurred, stir gently with a clean paddle. Do not shake vigorously to avoid air entrapment.
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3. Apply Primer
Apply a uniform coat using brush, roller, or low-pressure spray. Ensure full coverage without ponding.
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4. Allow to Dry
Allow primer to dry for approximately 30 minutes at 25°C. Surface must be tack-free before overcoating.
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5. Apply Waterproofing Membrane
Once dry, apply Adheseal waterproofing membrane as per technical instructions. Do not leave WBP exposed for extended periods.
Limitations & Safety
Product Limitations
Not suitable for external use or exposed applications.
Do not apply on non-porous surfaces or where moisture is present.
Must be top-coated with a compatible waterproofing membrane — not a standalone finish.
Safety & Handling Requirements
Personal Protective Equipment
Wear gloves and eye protection during application. Avoid skin contact with wet material.
Ventilation
Use in well-ventilated areas. Avoid inhaling mist or vapours if sprayed.
Storage & Disposal
Store in a sealed container between 5°C and 30°C. Protect from freezing. Dispose of in accordance with local regulations.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if present. Seek medical attention if irritation persists.
Skin:
Wash with soap and water. Remove contaminated clothing and launder before reuse.
Inhalation:
Move to fresh air. Seek medical attention if symptoms develop.
Ingestion:
Rinse mouth. Do not induce vomiting. Seek immediate medical advice.
Refer to the Safety Data Sheet (SDS) for full safety instructions.
Everflex WBP Application Guide
Concrete Slab (Internal)
Surface Preparation
Ensure slab is clean, dry, and free from laitance, dust, oil, or curing compounds.
Use Everflex WBP
Apply one even coat with a roller or brush. Allow to dry fully before membrane installation.
Fibre Cement Sheeting
Surface Preparation
Clean dust and debris from sheeting surface. Check for structural fixings and joints.
Use Everflex WBP
Improves bond uniformity of waterproofing membranes over FC sheeting.
Cement Render / Screeds
Surface Preparation
Render must be cured, clean, and free of dust or loose material. Vacuum if necessary.
Use Everflex WBP
Reduces porosity and prevents suction of moisture from membrane layers.
Masonry Block (Internal)
Surface Preparation
Ensure surface is dry and free of loose grit or efflorescence. Remove contaminants.
Use Everflex WBP
Stabilises dusting masonry and enhances membrane adhesion performance.
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