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Everflex Supaprime: A Technical Overview
Everflex Supaprime is a moisture-curing, polyurethane-based primer engineered to deliver optimal adhesion on both porous and non-porous substrates. With its very low viscosity and rapid dry time, this single-part formulation penetrates deeply into substrates, creating a robust foundation for Adheseal’s waterproof membranes and hybrid, MS, or polyurethane sealants. Supaprime resists mould and mildew in high-humidity areas, cures to a translucent film within approximately 1 hour at 23°C, and supports internal or external application scenarios. The ready-to-use format eliminates mixing errors, enabling faster site preparation and reducing callbacks.
Core Features & Specifications
- Moisture-curing, single-part polyurethane formula with no mixing required
- Fast tack-free time — dries to translucent film in ~1 hour at 23°C and 60% RH
- Clear amber liquid for easy visual confirmation during application
- Excellent adhesion to concrete, timber, screeds, render, cement board, and more
- Low viscosity (30–60 cps) promotes deep penetration into porous surfaces
- Application temperature range: 5°C to 35°C; humidity below 85%
- Shelf life of 12 months when stored cool and dry between 5°C and 35°C
- Coverage: approx. 5–10 m² per litre depending on substrate porosity
The Everflex Supaprime Advantage
- Enhances bond strength for membranes and sealants, reducing failure risk
- Ideal for site conditions requiring fast turnaround or limited downtime
- Improves substrate compatibility, even over aged masonry or cement sheet
- Reduces moisture-related adhesion failure in hot and humid climates
- Supports both internal and external sealing and waterproofing systems
Best Practices: Do's & Don'ts
Do
- Apply only to dry, clean, structurally sound substrates
- Use mechanical surface prep like diamond grinding for best bond
- Allow full cure (~1 hour at 23°C) before applying membranes or sealants
- Store product between 5°C and 35°C to maintain shelf life
Don't
- Apply if rain is imminent or substrate is damp
- Expose the primed surface to prolonged UV without overcoating
- Use on surfaces subject to hydrostatic pressure — use Everflex VBS instead
- Use solvents or acid etching for surface prep
Applications in Practice: Trade Scenarios
For Builders (On-site Installer): Concrete Prep Before Membrane
The Engineering Challenge
Builders often face variable concrete surface conditions. Dust, laitance, and residual moisture can all weaken membrane adhesion and result in costly call-backs or delamination.
The System-Based Solution with Everflex Supaprime
After mechanically grinding the surface, a single coat of Supaprime ensures deep penetration and substrate sealing. Coverage of 5–10 m²/L provides excellent prep efficiency with rapid cure time.
Best Practice Note
Use a roller for even film thickness and always confirm the primer stays visibly wet on the surface for 2 minutes before curing.
For Waterproofers (Remedial Specialist): Sealing Masonry in Humid Zones
The Engineering Challenge
Waterproofers operating in hot, humid regions struggle with mould growth and inconsistent substrate porosity on rendered or cement sheeting surfaces.
The System-Based Solution with Everflex Supaprime
Supaprime’s mould-resistant formula penetrates masonry and renders (cured for ≥4 days), improving system performance in bathrooms, balconies, or basements.
Best Practice Note
Always conduct a water drop test to assess porosity. Apply a second coat on high-suction substrates like Hebel block.
Performance Benchmark: Everflex Supaprime vs. Standard Alternatives
| Metric | Everflex Supaprime | Standard Alternative | Advantage |
|---|---|---|---|
| Tack-Free Time @25°C | 1–2 hrs Fast Curing | 3–6 hrs | Speeds up membrane or sealant application |
| Coverage per Litre | 5–10 m² Efficient Use | 3–6 m² | Lower material consumption |
| Application Temperature | 5°C to 35°C Wide Range | 10°C to 30°C | Better for Australian climate zones |
Frequently Asked Questions
What substrates can Everflex Supaprime be applied to?
Everflex Supaprime is suitable for both porous and non-porous substrates including concrete (cured 28 days), masonry/render (cured 4 days), cement sheeting, structural plywood (Type A), Villaboard, Hebel, and timber. Surface must be clean, dry, and contaminant-free before application.
How long does Everflex Supaprime take to dry before overcoating?
Supaprime typically dries to a translucent film within 1 hour at 23°C and 60% humidity. Membranes or sealants can be applied once the surface becomes tacky (not wet). Dry times may vary with substrate porosity and site conditions.
Can Everflex Supaprime be used in external waterproofing applications?
Yes. Everflex Supaprime is formulated for both internal and external use. However, it has limited UV resistance and must be overcoated with a membrane or adhesive system. Do not expose the primer film to long-term sunlight without protection.
What is the recommended method for cleaning tools after using Supaprime?
While still wet, clean tools and spills using acetone or xylene. Once cured, removal may require mechanical methods. Always wear gloves and PPE during clean-up, especially in confined or poorly ventilated areas.
How do I test if my surface is porous before using Everflex Supaprime?
To assess porosity, place a small puddle of water (size of a $1 coin) on the surface. If it absorbs within 2 minutes, the surface is porous. If the water beads or remains, it's non-porous. Supaprime is effective on both but may require a second coat on highly porous substrates.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Priming porous concrete before membrane application | Enhances membrane adhesion and prevents delamination | Builders, Waterproofers |
| Sealing masonry and render in humid environments | Reduces moisture absorption and mould risk | Remedial Contractors, Waterproofers |
| Priming timber or structural plywood substrates | Improves bonding strength for adhesives and sealants | Carpenters, Joiners |
| Preparation of cement sheeting prior to tiling | Prevents adhesive bleed-through and increases bond | Tilers, Builders |
| Rapid site priming prior to sealant installation | Fast-drying, labour-saving priming process | On-site Installers, Trade Contractors |
Applying Everflex Supaprime: Enhanced Protocols & Best Practices
-
1. Surface Evaluation & Porosity Test
Check that substrate is clean, dry, structurally sound, and properly cured. Perform a porosity test by applying a puddle of water (~$1 coin size) and timing absorption.
Porous Surface
If water absorbs in under 2 minutes, it's porous. These surfaces may require one or two coats of Supaprime.
Non-Porous Surface
If the water puddle remains, surface is non-porous. Apply a thin coat and test compatibility if unsure.
Timing: Perform test immediately prior to application to confirm surface condition.Pro Tip: Mechanical prep like dry diamond grinding improves surface profile and bond strength. -
2. Primer Application
Apply Everflex Supaprime using a roller, brush, or spray to achieve full coverage over the prepared surface.
Standard Method
Use a roller to apply an even coat at approx. 5–10 m² per litre depending on surface porosity.
Spray Application
Spraying can be used on large, open areas with low-wind conditions. Ensure atomisation does not cause overspray.
Timing: Surface should remain visibly wet for ~2 minutes post-application.Pro Tip: On porous substrates, a second coat may be required to prevent pinholes or suction loss. -
3. Curing and Overcoating
Allow Supaprime to dry until it forms a translucent film. Avoid foot traffic during cure time.
Standard Cure
Approx. 1 hour at 23°C and 60% RH. Humidity and substrate temperature may affect cure rate.
Accelerated Cure
Use forced air flow in cooler temperatures to maintain conditions within 5–35°C and <85% RH.
Timing: Do not overcoat until surface is tacky-dry, not wet. Typically 60 minutes cure.Pro Tip: If rain exposure occurs before curing, re-apply primer once substrate is dry.
Limitations & Safety
Product Limitations
Not suitable for application to damp or wet substrates. Ensure surface is completely dry prior to use.
Limited UV resistance — must be overcoated and not left exposed to sunlight for extended periods.
Not recommended for substrates under hydrostatic pressure or rising damp. Use Everflex VBS instead.
Do not apply when ambient temperature is below 5°C or above 35°C, or if relative humidity exceeds 85%.
Avoid solvent-based cleaning or acid etching for surface preparation — use mechanical abrasion only.
Safety & Handling Requirements
Personal Protective Equipment
Wear chemical-resistant gloves, long sleeves, eye protection, and enclosed footwear. Use respiratory protection where adequate ventilation cannot be maintained (AS/NZS 1715 & 1716 compliant).
Ventilation Requirements
Always work in a well-ventilated area. Indoors, use exhaust fans or cross-flow air movement. Avoid inhalation of vapours during and after application.
Fire & Handling Precautions
Flash point >93°C. Keep away from open flames, sparks, and heat sources. Do not smoke during application. Store securely away from oxidisers and acids.
Emergency First Aid
Eyes:
Flush eyes immediately with running water for at least 15 minutes. Seek medical attention urgently.
Skin:
Wipe off residue with dry cloth, then wash thoroughly with soap and water. Remove contaminated clothing.
Inhaled:
Move to fresh air. Administer oxygen if breathing is difficult. Seek immediate medical attention.
Swallowed:
Do NOT induce vomiting unless directed. Rinse mouth. Seek urgent hospital treatment or contact Poisons Centre (Australia: 13 11 26).
Seek medical attention immediately in all cases of serious exposure.
Everflex Supaprime Application Guide
Concrete (28-day cured)
Surface Preparation
Ensure concrete is fully cured (minimum 28 days), dry, and clean. Remove laitance or contaminants via dry diamond grinding. Vacuum thoroughly to eliminate dust and debris.
Primer Requirements
No primer typically required
Apply Everflex Supaprime directly to clean concrete. Second coat may be needed on highly porous areas.
Everflex SupaprimeSand-Cement Screed (3:1)
Surface Preparation
Allow screed to cure a minimum of 4 days. Surface must be dry and sound. Mechanically prepare if friable or dusty.
Primer Requirements
No primer typically required
Apply directly to dry screed. Ensure full surface coverage for maximum bond.
Everflex SupaprimeMasonry / Render (≥4 days cured)
Surface Preparation
Cure render for at least 4 days. Mechanically clean to remove laitance or dust. Ensure dry, porous surface before priming.
No primer typically required
Use a brush or roller to apply a single coat. Second coat may be needed for high suction substrates.
Everflex SupaprimeTimber Flooring (Structural Ply Type A)
Surface Preparation
Sand if required to remove surface residues. Ensure surface is dry and free from oil, wax, or sealers.
Primer required for critical applications
Always prime with Supaprime before applying adhesives or membranes. Ensure complete film coverage.
Everflex SupaprimeCement Sheeting / Blueboard / Villaboard
Surface Preparation
Ensure boards are clean, dust-free, and fixed according to manufacturer guidelines. Remove release agents from pre-coated boards.
No primer typically required
Apply evenly with brush or roller. Do not over-apply or allow pooling.
Everflex Supaprime
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