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Everflex WBP: Water-Based Primer for Porous Surfaces
Everflex WBP is a low-VOC, single-component water-based acrylic primer formulated to seal and stabilise porous substrates. Designed specifically for internal applications, it improves adhesion of waterproofing membranes and coatings to surfaces such as concrete, cement sheet, masonry, and render. Everflex WBP is easy to apply with brush or roller and supports sustainable building practices with Green Star compliance.
Key Features & Specifications
- Water-based and low-odour — ideal for enclosed and internal environments
- Improves bond strength of waterproof membranes to porous surfaces
- Simple one-coat application using brush, roller, or spray
- Fast drying with recoat window in as little as 30 minutes
- Complies with Green Star and environmental safety standards
Why Choose Everflex WBP?
- Recommended primer for use with Adheseal under-tile and wet-area membranes
- Reduces porosity and improves coverage of subsequent waterproofing coats
- Safe to use in bathrooms, laundries, and internal service areas
- Minimises dusting and substrate variability
Best Practices: Do's & Don'ts
Do
- Apply to clean, dry porous substrates only
- Use in conjunction with internal waterproofing systems
- Allow full drying before overcoating with membrane
- Store sealed in a cool, dry location
Don't
- Do not apply on wet or sealed surfaces
- Do not dilute unless directed by Adheseal technical team
- Do not leave exposed without membrane topcoat
Trade Use Cases: Applied in the Field
Waterproofer: Prepping Concrete Shower Base
The Problem
Waterproofing membrane lifts from dusty concrete slab in shower recess.
The Solution
Prime with Everflex WBP to bind dust and stabilise the surface before membrane application.
Best Practice
Ensure slab is fully dry and apply WBP using a roller. Allow at least 30 minutes before overcoating.
Tiler: Cement Sheet in Bathroom Walls
The Problem
Membrane shows uneven drying and poor coverage on raw FC sheeting.
The Solution
Apply Everflex WBP to reduce surface absorption and even out porosity prior to membrane.
Best Practice
Roll on one coat of WBP and allow to dry thoroughly before waterproofing layers.
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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