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GCP Epocote F100W Clear: A Product Overview
GCP Epocote F100W Clear is a professional-grade, two-pack water-based epoxy designed to solve common site challenges with damp and new concrete. This clear primer and sealer provides a tenacious bond, creating the perfect foundation for high-performance waterproofing systems like BITUTHENE® LM and AQUAGARD™. Its low-VOC, low-odour formula is ideal for applications where air quality is a concern. With an exceptionally long pot-life and fast cure time, it allows for efficient, waste-free application, ensuring you can get the job done right, first time.
60 mins
Generous Pot-Life at 25°C. Gives you the time to work without the stress of product going off in the bucket.
Core Features & Specifications
- Bonds to Damp & Green Concrete: Tenaciously adheres to concrete with up to 10% moisture content, saving valuable time on site and reducing project delays by minimising the traditional 28-day cure period.
- Very Low VOC & Low Odour: A safer choice for occupied areas or enclosed spaces, improving conditions for applicators and building occupants without compromising on performance.
- Fast-Curing Formula: Becomes tack-free in just 2-4 hours, allowing for subsequent coats or membrane application within 24 hours to keep the job moving forward.
- Chemically Resistant Sealer: Acts as a tough, clear barrier to prevent efflorescence and calcium leachate, protecting the aesthetic finish of tiles and other surfaces from unsightly staining.
The GCP Epocote F100W Clear Advantage
- Eliminate Costly Delays: Start your waterproofing application on concrete as early as 14 days, accelerating project schedules and increasing profitability.
- Reduce Material Waste: The long 60-minute pot-life means less rushed work and virtually no wasted material, making it an economical solution for projects of any size.
- Certainty in Application: Simple 1:1 mix ratio and easy water clean-up for uncured product removes complexity, allowing you to focus on a flawless application.
- Stand Behind Your Finish: Use it as a sealer to guarantee a clean, professional finish free from efflorescence, preventing frustrating callbacks and protecting your reputation.
Proactive Troubleshooting
Scenario: Application Over Contaminated Surfaces
Potential Outcome: Applying over dust, laitance, or form-release agents will compromise adhesion, leading to delamination, blistering, and complete system failure. This results in costly, reputation-damaging rework.
Adheseal Best Practice: The substrate is everything. Always ensure the concrete is structurally sound, clean, and free of all contaminants before starting. A mechanical grind is the sure way to guarantee a pristine surface for a permanent bond.
Applications in Practice: Trade Scenarios
For Waterproofers: Priming Green Concrete Slabs
The Professional's Challenge
Project deadlines are tight, but you're faced with a new concrete slab that requires the standard 28-day cure before you can apply the waterproofing membrane. Waiting means delaying the entire project schedule and incurring potential penalties.
The Adheseal Solution
With GCP Epocote F100W Clear, you can prime the slab once it reaches a minimum strength of 25 MPa (typically 14-28 days) and has a moisture content below 10%. This creates a high-adhesion, moisture-tolerant foundation ready for membranes like AQUAGARD™ or BITUTHENE® LM, allowing you to get on with the job weeks ahead of schedule.
Best Practice Note
For porous slabs prone to outgassing, apply the first coat diluted 10% with clean water. This helps prevent pin-holing in the final membrane system, ensuring a defect-free finish.
For Tilers & Remedial Contractors: Preventing Efflorescence
The Professional's Challenge
A finished tiling job, particularly on steps or retaining walls, is ruined by white, powdery efflorescence bleeding through the grout lines or staining the tile surface. The client is unhappy, and you're facing a callback to fix an aesthetic failure.
The Adheseal Solution
Apply GCP Epocote F100W Clear as a sealer over the clean, problematic surface. It penetrates and cures to a tough, chemically resistant barrier that locks in the salts within the substrate, permanently preventing them from migrating to the surface. This provides certainty that the final appearance will last.
Best Practice Note
Ensure the surface is thoroughly clean and dry before sealing. Any existing efflorescence must be removed with a stiff brush or appropriate cleaner for the sealer to perform effectively.
Frequently Asked Questions
Can I apply Epocote F100W to a visibly wet slab?
No. While it is designed for damp concrete, the surface must be free from ponding or running water. It is suitable for substrates with a maximum moisture content of 10%. Always ensure the surface is prepared correctly to guarantee a tenacious bond.
What is the maximum time I can leave the primer before applying a membrane?
The maximum re-coat time is 24 hours at 20°C. If this window is exceeded, the primed surface must be mechanically abraded and re-primed to ensure proper inter-coat adhesion for the subsequent waterproofing system. Plan your work accordingly to avoid this extra step.
Do I always need to dilute the first coat?
Dilution is only recommended for porous concrete substrates prone to pin-holing or outgassing. For standard, good-quality concrete, apply the product undiluted. If dilution is required for the first coat, the second coat must always be applied undiluted.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Primer on damp or "green" concrete slabs | Accelerates project timelines by reducing the standard concrete cure wait time. | Waterproofers, Builders, Flooring Contractors |
| Sealer to prevent efflorescence and leachate staining | Ensures a clean, high-quality aesthetic finish and prevents costly callbacks for staining issues. | Tilers, Remedial Contractors, Landscapers |
| Foundation primer for polyurethane and water-based membranes | Creates a tenacious, reliable bond, ensuring the long-term performance of the entire waterproofing system. | Waterproofers, Remedial Contractors |
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Primer on damp or "green" concrete slabs | Accelerates project timelines by reducing the standard concrete cure wait time. | Waterproofers, Builders, Flooring Contractors |
| Sealer to prevent efflorescence and leachate staining | Ensures a clean, high-quality aesthetic finish and prevents costly callbacks for staining issues. | Tilers, Remedial Contractors, Landscapers |
| Foundation primer for polyurethane and water-based membranes | Creates a tenacious, reliable bond, ensuring the long-term performance of the entire waterproofing system. | Waterproofers, Remedial Contractors |
Limitations & Safety
Product Limitations
Not for use on substrates with a moisture content exceeding 10% or those subject to rising damp or negative hydrostatic pressure.
Maximum re-coat time is 24 hours at 20°C. Exceeding this window requires mechanical preparation before re-priming.
Application temperature must be between 10°C and 35°C. Curing will be significantly delayed in cold weather.
Safety & Handling Requirements
Personal Protective Equipment
Always wear protective rubber gloves and safety glasses with side-shield protection. Avoid contact with skin and eyes. Contaminated work clothing should not be allowed out of the workplace.
Ventilation Requirements
Use only outdoors or in a well-ventilated area. Avoid breathing vapours or spray mist. Ensure adequate ventilation to maintain exposure levels below any workplace standards.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. If eye irritation persists, get medical attention.
Skin:
Wash with plenty of soap and water. If skin irritation or rash occurs, get medical advice. Take off contaminated clothing and wash it before reuse.
Inhaled:
Remove person to fresh air and keep comfortable for breathing. Seek medical advice if you feel unwell.
Swallowed:
Rinse mouth. DO NOT induce vomiting. Immediately seek medical advice.
Seek medical attention immediately in all cases of serious exposure.
GCP Epocote F100W Clear Application Guide
Concrete (Damp or "Green")
Surface Preparation
Substrates must be structurally sound (minimum 25 MPa), smooth, clean, and free from all dust, laitance, loose matter, oil, curing compounds, and other contaminants. Concrete should be 14-28 days old, depending on thickness.
System Compatibility
Acts as the required primer
This product is the primer. It is specifically designed to create a high-adhesion foundation for subsequent waterproofing membranes.
Compatible with BITUTHENE® LM Compatible with AQUAGARD™ Compatible with NEWFLEX™- Choosing a selection results in a full page refresh.