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Everflex VBS is a high-performance two-part water-based epoxy engineered to prevent delamination of moisture-sensitive finishes over green concrete or damp substrates. This versatile system acts as both a penetrating primer and a negative hydrostatic barrier capable of withstanding up to 250kPa (25m head of water), providing specialists with a reliable solution for below-ground lift pits and basements.
It bonds effectively to concrete cured for only 14 days or masonry after 4 days, allowing for significantly accelerated workflow timelines compared to traditional systems. With a low-VOC, Green Star compliant formulation and a rapid 2-hour recoat window, Everflex VBS ensures watertight integrity and superior membrane adhesion in demanding commercial environments.
Frequently Asked Questions
Is Primer VBS a one-part or two-part product?
Primer VBS is a professional two-part system. It consists of Part A (resin) and Part B (hardener). These two components must be mixed together thoroughly before application to initiate the chemical cure and create the functional vapour barrier.
What safety gear (PPE) do I need to use Primer VBS?
You must wear appropriate PPE when handling this product. This includes protective gloves (Nitrile rubber is suggested), safety glasses or chemical goggles, and protective clothing. Part A can cause serious eye irritation and skin irritation or an allergic reaction. If ventilation is inadequate, a suitable respirator is also required.
How does Primer VBS stop moisture?
When Part A and Part B are mixed and applied, the liquid cures into a dense, non-porous film. This cured barrier has a low moisture vapour transmission rate, effectively blocking moisture vapour rising from the concrete slab and protecting the flooring or coating system above from damage like blistering and delamination.
Limitations & Safety
Product Limitations
For Professional Use Only. This product is hazardous and requires professional handling and knowledge. It is not intended for DIY or general consumer use.
Part A is a Class 9 Dangerous Good (UN 3082) and is toxic to aquatic life with long-lasting effects. Avoid release to the environment and collect any spillage.
Part A may cause an allergic skin reaction. Avoid breathing vapours and repeated skin contact. Contaminated work clothing should not be allowed out of the workplace.
Always follow the Technical Data Sheet for mix ratios, pot life, coverage rates, and recoat times. Do not deviate from these instructions.
Safety & Handling Requirements
Personal Protective Equipment
Wear protective gloves (Nitrile rubber suggested), protective clothing (e.g., apron, rubber boots), and safety glasses or chemical goggles.
Ventilation Requirements
Use with adequate ventilation. If inhalation risk exists or ventilation is poor, wear a suitable organic vapour/particulate respirator.
Storage & Handling
Store in a cool, dry, well-ventilated place out of direct sunlight. Keep containers closed when not in use. Avoid eye and skin contact. Wash hands thoroughly after handling.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Seek medical attention without delay.
Skin:
Remove contaminated clothing. Wash skin with plenty of water and soap. If skin irritation or rash occurs, get medical advice/attention.
Inhaled:
Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTRE or doctor if you feel unwell.
Swallowed:
Rinse mouth. Immediately give a glass of water. Do NOT induce vomiting. Seek medical advice.
Seek medical attention immediately in all cases of serious exposure.
Applying Primer VBS: Enhanced Protocols & Best Practices
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1. Surface Preparation
The substrate must be clean, sound, dry, and free of all contaminants. Laitance, curing compounds, old adhesives, dust, and grease must be completely removed, typically by mechanical grinding. Ensure all dust is vacuumed from the surface.
Pro Tip: Do not cut corners on prep. 99% of coating failures are due to poor surface preparation. A clean, profiled surface is essential for a first-time-right result. -
2. Mixing
This is a two-part product. Combine Part A and Part B in the specified ratios (refer to Technical Data Sheet). Use a mechanical mixer (e.g., drill with paddle) at a low speed (300-400 rpm) to avoid introducing air.
Mixing Technique
Scrape the sides and bottom of the mixing container thoroughly while mixing to ensure all material is combined. Mix for 3-5 minutes until a completely uniform, streak-free colour is achieved.
Timing: Only mix what you can use within the product's pot life. Do not attempt to "save" mixed product or add solvent to extend it. -
3. Application
Apply the mixed Primer VBS immediately to the prepared substrate. Use a medium-nap roller or brush.
Application Technique
Apply evenly, ensuring a continuous, pinhole-free film to maintain the integrity of the vapour barrier. Work the primer into the substrate to ensure good penetration and adhesion. Observe coverage rates from the TDS.
Pro Tip: Check the Technical Data Sheet for recoat windows. Applying subsequent layers or topcoats within this window ensures a strong chemical bond between layers.
Limitations & Safety
Product Limitations
For Professional Use Only. This product is hazardous and requires professional handling and knowledge. It is not intended for DIY or general consumer use.
Part A is a Class 9 Dangerous Good (UN 3082) and is toxic to aquatic life with long-lasting effects. Avoid release to the environment and collect any spillage.
Part A may cause an allergic skin reaction. Avoid breathing vapours and repeated skin contact. Contaminated work clothing should not be allowed out of the workplace.
Always follow the Technical Data Sheet for mix ratios, pot life, coverage rates, and recoat times. Do not deviate from these instructions.
Safety & Handling Requirements
Personal Protective Equipment
Wear protective gloves (Nitrile rubber suggested), protective clothing (e.g., apron, rubber boots), and safety glasses or chemical goggles.
Ventilation Requirements
Use with adequate ventilation. If inhalation risk exists or ventilation is poor, wear a suitable organic vapour/particulate respirator.
Storage & Handling
Store in a cool, dry, well-ventilated place out of direct sunlight. Keep containers closed when not in use. Avoid eye and skin contact. Wash hands thoroughly after handling.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Seek medical attention without delay.
Skin:
Remove contaminated clothing. Wash skin with plenty of water and soap. If skin irritation or rash occurs, get medical advice/attention.
Inhaled:
Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTRE or doctor if you feel unwell.
Swallowed:
Rinse mouth. Immediately give a glass of water. Do NOT induce vomiting. Seek medical advice.
Seek medical attention immediately in all cases of serious exposure.
Primer VBS Application Guide
Concrete / Masonry Substrates
Surface Preparation
Substrates MUST be clean, sound, and free of all contaminants. Remove all dust, laitance, oil, grease, curing compounds, and old adhesives. Mechanical preparation, such as diamond grinding, is typically required for best results. Ensure the surface is dry before application.
Primer Requirements
This product IS the primer
Primer VBS is a self-priming system designed for direct application to prepared concrete and masonry surfaces. No other primer is typically required.
Porous Surfaces
Surface Preparation
Ensure the surface is structurally sound and free from loose or friable material. Clean thoroughly to remove all dust and contaminants. Allow to dry completely.
Primer Requirements
This product acts as a sealing primer
Primer VBS will penetrate and seal porous surfaces, consolidating them and providing a sealed base for subsequent applications. Ensure complete and even coverage.
Downloads & technical resources
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