Need a high-strength, permanent solution for bonding natural stone, precast concrete, and metal? Or for structurally repairing chips and voids in concrete and stone, without the risk of staining light-coloured materials? Megapoxy Megabond delivers.
Megapoxy Megabond is formulated as a 100% solids, two-component epoxy adhesive engineered for demanding structural bonds and repairs. It achieves very high strength, permanent adhesion between various construction materials like natural stone, precast concrete, and metals. Crucially, its non-staining formulation protects delicate, light-coloured stones, while its resistance to shock and chemicals ensures lasting performance in harsh environments.
Megabond features a simple 1:1 mix ratio by volume, blending easily into an off-white, creamy consistency. This texture allows for smooth application and easy spreading with a notched trowel. For optimal performance, ensure all surfaces are thoroughly clean and prepared; concrete requires mechanical abrasion or acid etching, and metals need grit blasting or mechanical abrasion to a bright finish. Proper mixing of Part A and Part B is critical for full cure and strength. For cleaning mixing implements and tools, use Megapoxy Thinners. Megabond can also be coloured using Megapoxy Pigment Paste Additive to match the substrate.
When your project demands permanent, high-strength structural bonding and repair for materials like natural stone, precast concrete, and metal, Megapoxy Megabond delivers superior performance and chemical resistance. Unlike general-purpose epoxies like Megapoxy E Epoxy, Megabond is specifically formulated to be non-staining for delicate, light-coloured stone. This critical differentiator means you achieve robust, long-lasting bonds without the risk of discolouration that can occur with alternative, less specialised adhesives or fillers.
Yes, Megabond is designed for structural concrete repairs, including floors, stairs, and columns. It achieves a compressive strength of 60MPa, which is superior to concrete itself, ensuring durable repairs.
No, Megabond is formulated not to stain light-coloured marbles and is suitable for bonding water-sensitive and composite stone. This maintains the aesthetic integrity of sensitive materials.
Metal surfaces require grit blasting to AS CK 9.4 - 1964 Class 3, or mechanical abrasion to a clean, bright finish. Degrease thoroughly after abrasion; wire brushing alone will not achieve adequate adhesion.
Inaccurate mixing or insufficient blending will reduce the physical properties of the cured epoxy. This can lead to bond failure, lower strength, unsatisfactory cure, and potential discolouration over time.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bonding natural stone and tile | Will not stain light-coloured marbles; secures water-sensitive and composite stone permanently. | Stonemasons, tilers |
| Structural bonding of precast concrete and metal | Achieves 60MPa compressive strength and 10MPa tensile bond to steel, creating bonds superior to concrete. | Precast manufacturers, concrete repairers, steel fabricators |
| Filling and repairing concrete defects | High strength (60MPa compressive) for durable repairs to floors, stairs, and columns; excellent chemical resistance. | Concrete repairers, civil contractors |
| Bonding compressed cement sheet, plasterboard, and timber | Forms strong, permanent bonds on various masonry and timber substrates for interior and exterior use. | Builders, carpenters, tilers |
| Bonding metal to metal, forming miter joints | High tensile shear strength (6MPa) and flexural strength (50MPa) for precise, strong metal assemblies. | Metal fabricators, stonemasons |
Use disposable rubber gloves to protect hands during mixing and application. Maintain proper industrial hygiene practices.
Store Megapoxy Megabond kits in a cool, dry place. Unused material should be disposed of in accordance with local regulations for epoxy resins.
Proper surface preparation is crucial for Megapoxy Megabond to achieve its documented high bond strengths and prevent early failure.
Surface prep: Remove all grease, oil, and surface laitance. Mechanical abrasion (scabbling, grit blasting, or grinding) is preferred. If not possible, acid etch with a 1:1 hydrochloric acid and water mix at 0.5 L/m². Allow 10 minutes to react, then wash thoroughly and scrub. Allow 24 hours to dry; the surface must be dry for maximum adhesion.
Primer: Not required. Megabond bonds directly to prepared concrete.
Surface prep: Grit blast to AS CK 9.4 - 1964 Class 3 finish. Alternatively, mechanically abrade to a clean, bright metal surface. After abrasion, degrease the surface with an industrial-grade degreaser. Wire brushing is insufficient for reliable adhesion.
Primer: Not required. Megabond bonds directly to prepared metal.
Surface prep: All existing coatings must be completely removed prior to bonding. For concrete, flame-clean or scutch paint, then diamond grind or scabble. For metals, use quality paint stripper, then grit blast or grind to a bright metal finish. Bonding to coated surfaces yields inferior strength.
Primer: Not required. The goal is direct bond to the base substrate.
| Property | Value |
|---|---|
| Mixing Ratio by Volume | 1 Part A to 1 Part B |
| Work Time at 25°C | 45 minutes |
| Minimum Cure Time at 15°C | 48 hours |
| Minimum Cure Time at 25°C | 24 hours |
| Minimum Cure Time at 35°C | 12 hours |
| Minimum Application Temperature | 10°C |
| Maximum Operating Temperature | 80°C |
| Colour Part A | White |
| Colour Part B | Natural |
| Appearance Mixed | Off White |
| Compressive Strength (ASTM D695-23) | 60 Mpa |
| Bond Strength Concrete (ASTM D4541) | >3 Mpa |
| Tensile Bond Strength Steel (ASTM D897-08) | 10 Mpa |
| Modulus of Elasticity (ASTM D695) | 2 Gpa |
| Flexural Strength (ASTM D790-17) | 50 Mpa |
| Tensile Strength (ASTM D638-22) | 18 Mpa |
| Tensile Shear Strength (ASTM D1002-10) | 6 Mpa |
| Hardness (Shore D - ASTM D2240-00) | 70 |
| Coefficient of Linear Thermal Expansion, Mean | 60 x 10-6 mm/mm/°C |
| VOC Content | VOC Free |
Here are some common examples on where Megapoxy Megabond used by our customers.
