Megapoxy P1: A Product Overview
When you need zero doubt in structural bonding and concrete repair, Megapoxy P1 provides proven, predictable performance. This two-component, gap-filling epoxy paste adhesive is engineered for the most demanding civil engineering and remedial applications. Once cured, it delivers strength that is superior to the concrete itself, giving you a permanent solution that removes the risk of costly callbacks.
Crucially, Megapoxy P1 is fully compliant with AS/NZS 4020:2018 for use in contact with potable water, making it the smart, verifiable choice for critical infrastructure. With a Nil VOC formulation and high chemical resistance (including hydrogen sulphide), it’s a job-site ready solution that protects your margins and your reputation.
80Mpa
Compressive Strength — delivers structural strength superior to concrete, ensuring your repair is a permanent, load-bearing solution.
Core Features & Specifications
- Simple 1:1 Mix Ratio: Easy-to-use 1 Part A to 1 Part B by volume mix ratio streamlines preparation and ensures predictable, error-free performance on site.
- No-Sag Paste: A true, creamy thixotropic paste that holds its form, allowing for clean vertical and overhead applications without slumping or dripping.
- Job-Site Ready: Engineered to adhere and cure effectively even in adverse conditions, including cold and damp environments (minimum 10°C).
- Nil VOC Formulation: A Nil VOC (Volatile Organic Compounds) product, making it a safer choice for enclosed spaces or sensitive environments.
- Long Work Time: A practical 60-minute work time (at 25°C) gives you ample time to apply, tool, and position components without rushing.
The Megapoxy P1 Advantage
- Protect Your Assets: With compressive strength (80Mpa) and concrete bond strength (>3Mpa) superior to the substrate, your work is permanent. No costly callbacks.
- Compliance Assured: Full AS/NZS 4020:2018 compliance removes the guesswork and risk from projects involving potable water tanks, pipes, and assets.
- Versatile Structural Solution: One product handles a wide range of applications, from bonding precast articles and grouting bolts to repairing fibreglass and natural stone.
- Durable in Harsh Environments: Excellent chemical resistance, including to hydrogen sulphide (H₂S), makes it a reliable choice for sewage treatment plants and industrial applications.
Adheseal tips for using Megapoxy P1
Scenario: Incorrect Mixing Ratio
Potential Outcome: The epoxy fails to cure, remains soft, or has severely compromised strength. This results in a total bond failure and a costly, difficult removal and redo.
Adheseal Best Practice: Always measure 1 Part A to 1 Part B by volume—do not guess. Mix thoroughly until the white and black pastes are a uniform dark grey, scraping the sides and bottom of the container to ensure 100% activation.
Scenario: Poor Surface Preparation
Potential Outcome: The adhesive bonds to laitance or contaminants, not the solid substrate. This leads to delamination or bond failure under load, completely compromising the repair.
Adheseal Best Practice: The surface must be sound, clean, and free of oil or grease. Mechanical abrasion (grit blasting, grinding) to remove all laitance is essential for a first-time-right structural bond.
Applications in Practice: Trade Scenarios
For Remedial Contractors: Structural Concrete Repair
The Professional's Challenge
Repairing spalled or damaged concrete columns, floors, or stairs where the fix must be structural, permanent, and often done on a vertical or overhead surface.
The Adheseal Solution
After preparing the substrate, trowel the no-sag Megapoxy P1 paste into the void. It will not slump, allowing you to build out the repair. Its 80Mpa compressive strength and >3Mpa bond strength ensure the repair is stronger than the original concrete. Success means a single-visit, permanent structural repair.
Best Practice Note
For steel protection, grit blast reinforcing steel to a bright metal finish before applying Megapoxy P1 directly. A 3mm layer provides protection equivalent to 50mm of concrete cover.
For Civil & Precast Installers: Structural Bonding
The Professional's Challenge
Grouting load-bearing bolts or structurally bonding precast concrete sections and metal fittings, requiring a guaranteed, high-strength bond that can be verified by engineers.
The Adheseal Solution
Megapoxy P1 provides documented, predictable performance, with a Tensile Bond Strength of 19Mpa to steel. The 1:1 mix and 60-minute work time allow for precise, unhurried application for grouting or bonding. Success means zero doubt in your structural connections and full compliance.
Best Practice Note
Metals *must* be grit blasted to a Class 3 finish or, at minimum, mechanically abraded to bright metal. Wire brushing is not sufficient and will only provide minimal adhesion.
Frequently Asked Questions
Can Megapoxy P1 be used in contact with drinking water?
Yes, absolutely. Megapoxy P1 has been independently tested and certified to AS/NZS 4020:2018, which is the Australian standard for products used in contact with potable water. This makes it ideal for repairing concrete water tanks, reservoirs, and pipes.
How critical is surface preparation before applying Megapoxy P1?
It is the most critical step for ensuring a structural bond. The substrate must be clean, sound, and mechanically abraded to remove all laitance, coatings, and contaminants. For steel, grit blasting is essential. A failure in preparation will lead to a failure in the bond.
What is the maximum gap that Megapoxy P1 can fill?
Due to its non-sag paste consistency, Megapoxy P1 is excellent for vertical and overhead gap filling. For deep voids or bulk filling applications (e.g., deeper than 25mm), it is best practice to apply the material in layers, allowing each layer to partially cure, to prevent exotherm (heat generation) issues.
What is the service temperature range of fully cured Megapoxy P1?
Once fully cured, Megapoxy P1 can withstand a continuous service temperature of up to 80°C. This ensures its high strength and bond properties are maintained in demanding industrial and infrastructure environments with significant temperature fluctuations.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Structural Concrete Repair Fixing spalls, cracks, and damaged sections. |
Delivers compressive strength (80 MPa) far exceeding the concrete for a permanent, load-bearing fix. | Remedial Contractors, Civil Engineers, Builders |
| Grouting Bolts, Dowels & Anchors Securing structural elements into concrete. |
High bond strength and nil shrinkage ensures maximum pull-out resistance and reliable load transfer. | Civil Engineers, Precast Installers, Structural Steel Erectors |
| Bonding Precast Concrete Elements Filling gaps and creating structural joints. |
Fills voids to create a monolithic, waterproof, and structural joint between segments and articles. | Precast Manufacturers, Civil Contractors |
| Metal to Concrete Bonding Creating high-strength structural connections. |
Tenacious bond to properly prepared steel and concrete, perfect for fixing plates, tracks, or supports. | Structural Engineers, Fabricators, Builders |
| Potable Water Tank & Pipe Repair Sealing cracks and joints in water infrastructure. |
Fully certified to AS/NZS 4020:2018 for safe, compliant, and permanent repairs in drinking water systems. | Water Authorities, Plumbers, Council Maintenance |
Applying Megapoxy P1: Enhanced Protocols & Best Practices
-
Step 1: Surface Preparation
The long-term performance of Megapoxy P1 is entirely dependent on the quality of surface preparation. All substrates must be clean, dry, and structurally sound.
Concrete & Masonry
Mechanically abrade the surface via grinding or grit-blasting to remove all laitance and contaminants. The ideal surface profile is clean with exposed aggregate.
Metal Surfaces
Grit blast steel surfaces to a bright metal finish (AS CK 9.4-1964 Class 3). Degrease with a high-quality solvent like Adheseal Surface Prep. Do not wire brush.
Pro Tip: After abrading, remove all dust from the substrate with a vacuum or oil-free compressed air. Even a fine layer of dust can compromise the bond. -
Step 2: Mixing
Combine Part A (White) and Part B (Black) in a strict 1:1 ratio by volume. Mix thoroughly using a slow-speed drill with a paddle mixer or by hand on a mixing board.
Visual Check for Thoroughness
Continue mixing until a completely uniform, streak-free, dark grey colour is achieved. Scrape the sides and bottom of the mixing container to ensure all material is incorporated.
Work Time: You have approximately 60 minutes of work time at 25°C. This time will be shorter at higher temperatures and longer at lower temperatures. Only mix as much material as can be used within this timeframe. -
Step 3: Application & Curing
Apply the mixed Megapoxy P1 to the prepared surface using a trowel or spatula. For bonding, apply to one surface and press the components together firmly. For repairs, build up the material to the desired profile.
Tooling & Finishing
The creamy, non-sag paste allows for easy tooling on vertical and overhead surfaces. Ensure good contact and pressure to eliminate any air voids.
Cure Time: The product achieves initial cure in 24 hours at 25°C, and full cure with maximum properties in 4 days. Do not subject the bond to high loads until a full cure is achieved.Pro Tip: For cleaning un-cured epoxy from tools and equipment, use Megapoxy Thinners. Once cured, the material must be removed mechanically.
Limitations & Safety
Product Limitations
Minimum application temperature is 10°C. Application below this temperature will significantly extend cure times and may compromise performance.
Not intended for use on substrates with active water leaks or negative-side hydrostatic pressure.
For Professional Use Only. This product requires advanced surface preparation techniques and adherence to strict safety protocols outlined in the SDS. It is not suitable for DIY or general handyman use.
Safety & Handling Requirements
Personal Protective Equipment
Mandatory: Wear chemical-resistant gloves (nitrile rubber recommended), safety glasses with side-shields or chemical goggles, and long-sleeved protective clothing. Avoid all skin and eye contact.
Ventilation Requirements
Use in a well-ventilated area. If dust or vapours are generated during use, local exhaust ventilation is required to keep air concentrations below exposure standards.
Handling & Storage
Store in a cool, dry place out of direct sunlight. Keep containers sealed when not in use. Contaminated work clothing should not be allowed out of the workplace and must be washed before re-use.
Emergency First Aid
Eyes:
Immediately hold eyelids apart and flush continuously with running water for at least 15 minutes. Urgently seek medical attention. Part B can cause serious eye damage.
Skin:
Remove contaminated clothing and wash skin thoroughly with soap and water. If irritation or rash occurs, get medical advice.
Inhaled:
Remove victim from exposure to fresh air. Keep at rest in a comfortable position. Seek medical advice if effects persist.
Swallowed:
Rinse mouth with water. Do NOT induce vomiting. Give a glass of water to drink. Seek immediate medical advice.
Refer to the Safety Data Sheet (SDS) for full details. Seek medical attention immediately in all cases of serious exposure.
Substrate Adhesion & Preparation Guide
Concrete & Masonry
Surface Preparation
Surfaces must be structurally sound and free from all contaminants like grease, oil, dust, and curing compounds. Remove surface laitance via mechanical abrasion (grit blasting, scabbling, or grinding) to expose clean aggregate. The surface should be dry before application.
Primer Requirements
No primer typically required
When bonding to a correctly prepared, sound substrate, Megapoxy P1 is self-priming. Ensure all loose material is removed after abrading.
Steel (Mild, Galvanised, Reinforcing)
Surface Preparation
All surfaces must be grit blasted to a Class 3 bright metal finish (AS CK 9.4-1964). Remove all rust, scale, and paint. Degrease the surface with an industrial grade solvent like Adheseal Surface Prep. Wire brushing is not sufficient and will result in minimal adhesion.
Primer Requirements
Self-priming for corrosion protection
For protecting reinforcing steel, Megapoxy P1 can be applied directly to the prepared steel as a protective anti-corrosion barrier and bond coat before applying concrete patch repairs.
Fibreglass & Composites
Surface Preparation
Ensure the surface is clean, dry, and completely free of any release agents, waxes, or oils. Thoroughly abrade the bonding area with 80-grit sandpaper to create a deep mechanical key, then wipe away all dust with a clean, dry cloth or a solvent wipe using Adheseal Surface Prep.
Primer Requirements
No primer required
A direct bond to a clean and well-abraded fibreglass surface will yield excellent adhesion without the need for a primer.
- Choosing a selection results in a full page refresh.