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Vertical concrete repairs or overhead bonding jobs present unique challenges. Gravity works against standard adhesives, and cold or damp conditions can compromise cure. Megapoxy 254 provides a robust, non-sag epoxy paste that locks in place. It holds fast on vertical and overhead surfaces. It also cures effectively even in cold and damp conditions, ensuring project continuity and structural integrity.
Megapoxy 254 is a specially formulated, two-part epoxy paste designed for high-strength filling and adhesion where traditional products fail due to consistency or environmental factors. It delivers a permanent, structural bond for applications ranging from concrete and metal to natural stone and ceramics. Its unique composition ensures it will not stain or discolour white or light-coloured marble, crucial for high-visibility architectural finishes. This product addresses the need for reliable performance in demanding conditions, offering a volatile organic compounds (VOC) free solution for varied construction and repair tasks.
Megapoxy 254 features a simple 1:1 mix ratio by volume, reducing complexity and potential for error on site. Its creamy, non-sag texture allows for easy blending and application, particularly on vertical and overhead surfaces without slumping. Proper surface preparation is paramount for achieving the stated bond strengths; this often involves mechanical abrasion like grit blasting or grinding for concrete and metal. Once mixed thoroughly, the paste can be tooled into place. Cleanup of tools and mixing implements requires Megapoxy Thinners.
Choose Megapoxy 254 for robust, non-sag bonding and filling on vertical or overhead surfaces. It excels in applications requiring strong adhesion and cure under adverse cold or damp conditions. This differentiates it from standard adhesives that may sag or fail under such environmental stresses. For other specific applications, consider Megapoxy HX Epoxy Resin, Megapoxy H Epoxy Resin, or Megapoxy Megadure Epoxy.
Yes, it forms high-strength permanent bonds. Its 70 MPa compressive strength and concrete bond strength exceeding 3 MPa ensure structural integrity for concrete repairs and heavy-duty bonding applications.
No, when mixed correctly, Megapoxy 254 will not stain or discolour white or light-coloured marble and ceramics. This makes it suitable for use with sensitive finishes where discolouration is a concern.
Apply Megapoxy 254 at a minimum temperature of 10°C. While it is formulated to cure under cold and damp conditions, adhering to this minimum ensures optimal performance and reliable cure times.
Yes, thorough surface preparation is critical for achieving documented bond strengths on metal. Grit blasting to AS CK 9.4 - 1964 Class 3 is recommended; wire brushing is insufficient and will provide minimal adhesion only.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bonding precast concrete articles | Achieves >3 MPa bond strength to concrete, creating high-strength, permanent connections for structural elements. | Civil contractors, precast manufacturers |
| Metal to concrete bonding | Forms a strong, permanent bond to steel (20 MPa tensile bond strength) and concrete, ideal for anchoring or joining dissimilar materials. | Structural engineers, fabricators, concrete repairers |
| Grouting bolts and anchors | Delivers 70 MPa compressive strength, securely embedding bolts and anchors with integrity superior to concrete itself. | Mechanical engineers, installers, civil contractors |
| Repair of concrete pipes, tanks, floors, and stairs | Offers excellent tensile and flexural strengths (22 MPa and 38 MPa respectively) for durable, chemical-resistant repairs to critical infrastructure. | Concrete repair specialists, civil contractors |
| Bonding natural stone, bricks, and ceramics | Will not stain or discolour white or light-coloured sensitive materials when properly mixed, providing clean, secure adhesion. | Tilers, stonemasons, landscapers |
| Vertical and overhead filling and repair | Non-sag properties ensure the paste stays in place on vertical and overhead surfaces without slumping during application. | Concrete repairers, builders |
| Bonding and curing in damp or cold conditions | Adheres and cures effectively under adverse conditions (down to 10°C and damp), extending the working window and reducing weather-related delays. | All trades working outdoors or in unconditioned spaces |
| Flush-filling countersunk screws in fibre cement sheet | Provides a smooth, durable, and VOC-free finish for concealed fixings, allowing for painting or further surface treatments. | Carpenters, facade installers |
Ensure all substrates are prepared as per the Substrate Preparation Guide. The surface must be clean, sound, and free of all laitance, grease, oil, dust, and any previous coatings. This step is critical to achieving the specified bond strength.
It is essential that the correct 1:1 ratio is used and that the parts are mixed thoroughly. Inaccuracies or poor mixing will lead to a failed cure and discolouration.
Dispense 1 Part A to 1 Part B by volume onto a clean mixing board or surface.
Using a spatula or trowel, blend the two parts vigorously. Scrape the edges and fold the material back into the centre repeatedly until a completely uniform, streak-free white paste is achieved.
Apply the mixed paste to the prepared substrate using a spatula or trowel. For bonding, apply to one or both surfaces and press together firmly. For filling, press the paste firmly into the void, ensuring no air is trapped.
DANGER: Causes skin irritation. May cause an allergic skin reaction. Causes serious eye damage. Toxic to aquatic life with long lasting effects.
Wear safety shoes, protective gloves (nitrile rubber recommended for intermittent contact), and safety glasses. A suitable respirator should be worn if breathing dust, fume, gas, mist, vapours, or spray cannot be avoided.
Natural ventilation is adequate under normal use conditions. Ensure that eyewash stations and safety showers are close to the workstation location.
Store in a cool, dry, well-ventilated place and out of direct sunlight. Keep containers upright and closed when not in use. Store away from foodstuffs, incompatible materials (oxidising agents), and sources of heat or ignition. Dispose of contents and container in accordance with local, regional, national, and international regulations. This material is a Scheduled Poison Schedule 5 (Caution).
Proper substrate preparation is essential for Megapoxy 254 to achieve its documented bond strengths and ensure long-term performance.
Surface prep: Degrease thoroughly to remove oil and grease. Remove all surface laitance by mechanical abrasion such as scabbling, grit blasting, or grinding. If mechanical methods are not possible, acid etch using a 1:1 hydrochloric acid solution at 0.5 L/m², allowing it to react for 10 minutes before washing and scrubbing. Allow 24 hours to dry. Concrete must be surface dry for maximum adhesion.
Primer: Not required.
Surface prep: Grit blast to AS CK 9.4 - 1964 Class 3 finish. If grit blasting is not feasible, mechanically abrade to a clean, bright metal finish. After abrasion, degrease the surface with an industrial-grade degreaser. Note that wire brushing alone is insufficient and results in minimal adhesion.
Primer: Not required.
Surface prep: All existing paint, coatings, or galvanising must be completely removed. For coated concrete, flame-cleaning or mechanical treatment with a scutching tool should be followed by diamond grinding or scabbling. For coated metals, use a good quality paint stripper, then grit blast or grind to a bright metal finish.
Primer: Not required.
| Property | Value |
|---|---|
| Mixing Ratio By Volume | 1 Part A to 1 Part B |
| Work Time at 25C | 45 minutes |
| Minimum Application Temperature | 10°C |
| Maximum Operating Temperature | 70°C |
| Compressive Strength (ASTM D695-23) | 70 MPa |
| Bond Strength Concrete (ASTM 4541) | >3 MPa |
| Tensile Bond Strength Steel (ASTM D897-08) | 20 MPa |
| Modulus of Elasticity (ASTM D695) | 2 GPa |
| Flexural Strength (ASTM D790-17) | 38 MPa |
| Tensile Strength (ASTM D638-22) | 22 MPa |
| Tensile Shear Strength (ASTM D1002-10) | 13 MPa |
| Hardness Shore D (ASTM D2240-00) | 70 |
| Coefficient of Linear Thermal Expansion | 70.4 x 10^-6 mm/mm/°C |
| Dielectric Strength 50Hz at 25C | 190 Kv/cm |
| Minimum Cure Time at 15C | 48 hours |
| Minimum Cure Time at 25C | 24 hours |
| Minimum Cure Time at 35C | 12 hours |
| VOC Content | Nil |
Here are some common examples on where Megapoxy 254 used by our customers.
