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Dealing with damp or green concrete often means waiting, or risking coating failure. Megapoxy 154 takes away that constraint. It creates a robust bond to challenging substrates, allowing quicker project turnaround. Get reliable adhesion and a durable finish where moisture is a constant factor.
Megapoxy 154 was formulated to bring the proven strength and adhesion of epoxy resins into a water-based, environmentally friendly system. It excels as a primer, moisture barrier, and protective coating for concrete and masonry, particularly on damp or freshly poured surfaces. This product provides a tough, chemical-resistant matte finish, making it ideal for large internal areas subjected to foot and light vehicular traffic.
Mixing Megapoxy 154 is a two-stage process: first, thoroughly combine Part A and Part B for a minimum of three minutes using a mechanical stirrer. Only after this initial blend can up to 25% water be added and mixed until fully homogeneous. This sequence is critical for achieving the correct consistency and cure properties. Application is straightforward via brush, roller, or airless spray. Ensure the material is worked into the substrate to fill voids and prevent pinholing, applying successive coats at right angles. If a non-slip finish is required, fine epoxy grade sand aggregate can be mixed into the product for an even texture, or broadcast into the wet coating for a coarser profile, then sealed with additional coats.
Clean up mixing implements and tools with Megapoxy Thinners, or clean cold water and detergent immediately after use. Always refer to the Megapoxy 154 Safety Data Sheets (SDS) prior to use and ensure proper ventilation, especially in enclosed areas, to allow for adequate evaporation and cure.
Megapoxy 154 typically serves as a crucial preparatory layer within a flooring or concrete protection system. It establishes the bond directly to the concrete or masonry, often as the first step on damp or green substrates. Once cured for a minimum of 24 hours, it forms a stable base for subsequent materials, including a wide range of acrylic and polyurethane membranes, adhesives, mortars, and decorative coatings. Its role as a moisture barrier is essential for the long-term performance of floor coverings like vinyl and timber, protecting them from substrate moisture. When used as a protective topcoat, it can be paired with a UV-resistant topcoat for external applications.
Megapoxy 154 is classified as Dangerous Goods for transport by road, rail, air, and sea (Part B is Class 8 Corrosive; Part A is Class 9 Environmentally Hazardous Substance). It is a Scheduled Poison (Schedule 5), requiring careful handling and storage in accordance with relevant Australian regulations. The product is listed on the Australian Inventory of Chemical Substances (AICS), confirming its suitability for use in Australia.
Unlike traditional solvent-based epoxies or heavy-duty structural compounds found in the Megapoxy range, Megapoxy 154 is specifically designed as an environmentally friendly, water-based coating and primer. It excels on damp and green concrete surfaces, offering unique advantages where moisture is present and low VOCs are preferred. Other Megapoxy systems, such as general-purpose epoxies or structural adhesives, are formulated for different performance criteria, such as extreme chemical resistance, high build, or load-bearing applications on dry substrates. Megapoxy 154 fills the niche for water-based priming, sealing, and light-duty protective coating, particularly where dampness is a factor.
No, Megapoxy 154 is not a waterproofing membrane on its own. It functions as a moisture barrier and primer, but a dedicated waterproofing membrane is required for full protection.
Megapoxy 154 provides excellent adhesion and penetration to damp surfaces and green concrete. This allows for priming and sealing earlier, reducing waiting times before applying vinyl, timber overlays, or other membranes.
Apply above 10°C to prevent slow curing and amine blush, which appears as an oily residue. Ensure adequate mixing and allow mixed material to stand for 5 minutes to accelerate drying time. Warm the substrate surface if needed.
Megapoxy 154 will chalk and yellow when exposed to UV light. For external use, always apply a UV-resistant topcoat to maintain aesthetic and performance. It is not suitable for steel or metal surfaces.
| Application | Key benefit | Primary trades |
|---|---|---|
| Primer for damp or green concrete | Achieves excellent adhesion and penetration, allowing earlier application of subsequent overlays and membranes. | Concrete contractors, flooring installers |
| Moisture barrier for concrete slabs | Seals concrete before vinyl and timber overlays, mitigating moisture-related failures and ensuring bond. | Flooring contractors, builders |
| Dust sealing for interior concrete floors | Provides a tough, chemical-resistant matte coating, reducing dust generation in high-traffic areas. | Warehouse managers, commercial builders |
| Protective coating for traffic areas | Offers resistance to chemicals, foot traffic, and light vehicular traffic in car parks and warehouses. | Flooring applicators, facility maintenance |
| Concrete curing membrane | Assists in the proper curing of concrete, enhancing its long-term durability and surface integrity. | Concrete placers, civil contractors |
The Engineering Challenge: A below-grade concrete slab is persistently damp due to ambient moisture, preventing the application of standard solvent-based primers and membranes. Waiting an unknown time for the slab to fully dry is not an option.
The System-Based Solution with Megapoxy 154: After cleaning the surface, apply two coats of Megapoxy 154 directly to the damp concrete. Its water-based formulation will penetrate and cure, creating a sealed, high-adhesion surface. After a 24-hour cure, this surface is ready to receive a compatible waterproofing membrane system, ensuring a reliable bond.
Best Practice Note: Application in high humidity (>80% RH) will dramatically slow the cure rate. Ensure good ventilation and air movement to facilitate water evaporation from the coating film.
The Engineering Challenge: A large, newly poured concrete warehouse floor needs to be covered with vinyl flooring on a fast-track schedule. Waiting the traditional 28 days for the concrete to cure and dry would cause major project delays.
The System-Based Solution with Megapoxy 154: As soon as the green concrete can be walked on, apply a two-coat system of Megapoxy 154. This acts as both a curing compound and a moisture barrier. The floor can then be prepared for the vinyl overlay weeks ahead of schedule, with the confidence that residual moisture from the slab is sealed off.
Best Practice Note: Porous or roughly finished concrete may require a third coat to achieve a complete, pinhole-free seal. Always check the surface after the first coat to assess if additional material is needed.
Part B causes severe skin burns and eye damage. Both Part A and Part B may cause an allergic skin reaction.
Wear safety shoes, nitrile rubber gloves, and safety glasses. A suitable respirator is recommended to avoid breathing vapours, mists, or aerosols.
Ensure adequate natural ventilation during application and curing. In enclosed areas like basements, provide ventilation to assist evaporation and prevent fume accumulation.
Store in a cool, dry, well-ventilated place away from direct sunlight, foodstuffs, heat, and ignition sources. Keep containers upright and closed. Megapoxy 154 Part B is corrosive and should be stored locked up. Dispose of contents and containers according to local regulations. Both components are Schedule 5 poisons.
Proper substrate preparation is critical for Megapoxy 154 to achieve optimal adhesion and performance, preventing coating failures.
Surface prep: Ensure all surfaces are structurally sound. Mechanically remove existing coatings, adhesives, efflorescence, or laitance through grinding, abrasive blast cleaning, high-pressure washing, or mechanical scrubbing. Clean surfaces thoroughly, removing all dirt, grease, oil, and other contaminants. Repair non-structural cracks and deformities with appropriate Megapoxy repair products before application.
Primer: Not required. Megapoxy 154 acts as its own primer for these surfaces.
Surface prep: Follow all preparation steps for concrete. The product is formulated for application on damp and green concrete, but standing water must be removed.
Primer: Not required. Megapoxy 154 is specifically designed for excellent adhesion and penetration on damp and green concrete, functioning as a primer and moisture barrier.
| Property | Value |
|---|---|
| Product Family | Water Based Epoxy Sealer |
| Mixing Ratio by Volume | 1 Part A : 1 Part B |
| Work Time at 25°C | 60 minutes |
| Minimum Thin Film Cure Time at 25°C | 140-180 minutes |
| Minimum Application Temperature | 10°C |
| Maximum Operating Temperature | 80°C |
| Colour Part A | White |
| Colour Part B | Brown |
| Colour Mixed | White |
| Specific Gravity Part A at 25°C | 1.05 - 1.10 |
| Specific Gravity Part B at 25°C | 0.95 - 0.99 |
| Mixed Specific Gravity at 25°C | 1.02 |
| Part A Viscosity at 25°C | 20,000 - 30,000 mPa.s |
| Part B Viscosity | 110 - 145 Pas |
| Part A pH at 20°C | ca. 7 |
| Part B pH at 20°C | ca. 10 |
| Part A Flash Point | >100°C |
| Part B Flash Point | >100°C |
| Application Rate Smooth Finish | 5 - 8 m²/litre |
| Minimum Coats | 2 coats |
| Packaging | 20L kits |
Here are some common examples on where Megapoxy 154 used by our customers.
Flooring
As a moisture barrier on concrete slabs before installing sensitive vinyl or timber flooring overlays.
Effectively seals concrete surfaces, preventing moisture-related failures and ensuring long-term bond integrity of floor coverings.
Civil Construction
When preparing new or existing concrete and masonry surfaces that are damp or still 'green' for further coatings.
Ensures superior adhesion and penetration on moist substrates, allowing earlier application of subsequent materials and preventing failure.
Flooring
Installing moisture-sensitive vinyl or timber flooring over concrete slabs prone to moisture vapour transmission.
Forms an effective moisture barrier on damp concrete, protecting overlays from slab moisture while providing a strong base for adhesives.
Industrial
Reducing dust generation on interior concrete floors in high-traffic car parks or warehouses.
Delivers a tough, chemical-resistant matte coating, effectively sealing floors and reducing dust in high-traffic commercial areas.
Civil Construction
Applying a durable coating to concrete surfaces in areas susceptible to chemical spills, frequent cleaning, or light mechanical abrasion.
This water-based epoxy cures to a tough, chemical and water-resistant finish, protecting concrete from degradation caused by various chemicals and extending its service life under demanding conditions.
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