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When a structural bond must hold, even under extreme impact or in persistent moisture, Megapoxy 69 provides the reliability needed. It handles critical connections between concrete, metal, timber, and stone with a strength that lasts. This product ensures structural integrity for jobs demanding unwavering performance, whether onshore or in marine environments.
Megapoxy 69 is an epoxy structural adhesive formulated for heavy-duty applications where permanent, impact-resistant bonds are essential. Its non-sag gel consistency allows for effective use on vertical or overhead surfaces without slumping. Engineered for superior adhesion across diverse materials, it is ideal for civil engineering, marine construction, and structural timber applications. It also features very low VOC content, supporting healthier working conditions.
Megapoxy 69 uses a simple 1:1 mix ratio by volume. It is critical to measure and mix both Part A and Part B thoroughly to ensure full cure and achieve the specified physical properties. Inaccurate mixing can lead to discolouration, incomplete curing, and reduced performance. The minimum application temperature is 10°C, and cure times vary significantly with temperature, ranging from 12 hours at 35°C to 48 hours at 15°C. For tool cleaning, use Megapoxy Thinners.
Surface preparation is paramount for optimal adhesion. Concrete substrates require mechanical abrasion such as scabbling, grit blasting, or grinding to remove laitance and create a sound profile. Acid etching is an alternative if mechanical methods are not possible, followed by thorough washing and 24 hours of drying. Metal surfaces must be grit blasted to AS 1627.2.2002 or mechanically abraded to bright metal, then degreased. All existing coatings must be removed for maximum bond strength. Always ensure substrates are dry.
Megapoxy 69 is engineered for critical, heavy-duty structural bonding and repair requiring exceptional strength, impact resistance, and marine durability with a non-sag application. While other Megapoxy P-series products like Megapoxy PM, PF, P1, and HT offer robust epoxy solutions, Megapoxy 69 distinguishes itself when the project specifically demands superior structural performance under impact, in harsh marine conditions, and where a highly thixotropic, non-sag paste is essential for vertical or overhead work. It is formulated to create bonds that are often stronger than the materials they join, making it the choice for demanding structural integrity where fast cure or more general-purpose bonding might be insufficient.
Yes, Megapoxy 69 is specifically designed for structural bonding and repairs in civil engineering. It achieves an ultimate compressive strength of 120MPa and a bond strength to concrete of over 3MPa, making it suitable for demanding applications like concrete column repair and infills.
Yes, Megapoxy 69 is a non-sag gel. This creamy texture allows for effective application on vertical surfaces and overhead without slumping, maintaining consistent bond lines and fill volume.
For optimal adhesion on metal, grit blasting to AS 1627.2.2002 is recommended. If grit blasting is not possible, mechanically abrade the surface to a clean, bright metal, then degrease thoroughly. Wire brushing alone is not sufficient and yields minimal adhesion.
No, for the documented high bond strengths, all existing coatings, paint, or galvanizing must be completely removed. Bonding directly to prepared substrates ensures superior and reliable performance.
| Application | Key benefit | Primary trades |
|---|---|---|
| Structural bonding of metals (steel, aluminium) | Achieves high tensile lap shear strengths (17MPa steel-to-steel, 14MPa aluminium-to-aluminium) for permanent, load-bearing connections. | Structural fabricators, civil engineers, marine builders |
| Bonding concrete to concrete or masonry | Develops bond strength over 3MPa to concrete, superior to the concrete's tensile strength, for robust repair and connection. | Civil engineers, concrete repair specialists, masonry contractors |
| Structural timber joinery | Forms very high strength permanent bonds capable of resisting repeated high impact forces in timber structures. | Joiners, timber framers, marine builders |
| Assembly of natural stone and fibreglass fabrications | Provides a strong, non-sag bond for granite, marble, and fibreglass, maintaining position on complex assemblies. | Stone masons, fibreglass fabricators, architectural fixers |
| Filling splits, cracks, knot holes, and voids in concrete/stone | The non-sag gel fills gaps effectively, providing structural integrity with 120MPa compressive strength. | Concrete repairers, stone restoration specialists |
| Marine environment applications | Retains high strength and offers excellent chemical resistance, ensuring durability in harsh marine conditions. | Marine builders, boat repairers |
Proper surface preparation is non-negotiable for achieving the specified bond strength. All substrates must be structurally sound, clean, dry, and free of any contaminants.
Mechanically abrade by grinding or scabbling to remove laitance and expose a clean surface. Remove all dust.
Grit blast or grind to a bright metal finish, then immediately solvent wipe with an industrial degreaser to remove all residues.
Combine Part A and Part B in a 1:1 ratio by volume. It is essential that this ratio is measured accurately.
Mix thoroughly with a spatula or mechanical mixer until a uniform, light yellow colour is achieved. Pay close attention to scraping the sides and bottom of the mixing container to ensure all material is fully combined. Poor mixing will result in a weak bond and may prevent the product from curing correctly.
Apply the mixed gel to the prepared surfaces using a trowel or spatula. For bonding applications, press the surfaces firmly together to ensure full contact. For repairs, work the material into the void to eliminate air pockets.
DANGER: Megapoxy 69 is a Scheduled Poison (S5. Caution). Part A is classified as a Class 9 Miscellaneous Dangerous Good for transport.
Wear safety shoes, nitrile rubber gloves, and safety glasses. Wear protective clothing and suitable respiratory protection where vapours or mists are generated. Ensure eyewash stations and safety showers are readily accessible.
Natural ventilation is adequate under normal use conditions. Avoid breathing dust, fumes, or vapours.
Store in a cool, dry, well-ventilated place, out of direct sunlight and away from foodstuffs, incompatible materials (oxidising agents), heat, and ignition sources. Keep containers upright and closed when not in use. Dispose of contents and containers in accordance with local, regional, national, and international regulations. Contaminated work clothing should not leave the workplace.
Proper surface preparation is fundamental for Megapoxy 69 to achieve its documented high bond strengths and ensure long-term performance.
Surface prep: Ensure the concrete is free from grease, oil, and surface laitance. Laitance removal is best achieved through mechanical abrasion such as scabbling, grit blasting, or grinding. If mechanical methods are not feasible, acid etching can be performed using a 1:1 hydrochloric acid to water solution applied at 0.5 L/m², allowed to react for 10 minutes, then thoroughly washed and scrubbed. For maximum adhesion, the concrete must be surface dry before application. For painted concrete, flame-cleaning or scutching to remove paint, followed by diamond grinding or scabbling, is required.
Primer: Not required.
Surface prep: Metals must be grit blasted to AS 1627.2.2002 for optimal results. Alternatively, mechanically abrade the surface to a clean, bright metal finish. Degrease the surface thoroughly after abrasion. Wire brushing is not adequate for achieving sufficient adhesion. For painted or galvanised metals, remove all coatings using a good quality paint stripper, then follow with grit blasting or grinding to a bright metal finish.
Primer: Not required.
| 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 |
| Appearance Mixed | Light Yellow |
| Ultimate Compressive Strength (ASTM C579) | 120 MPa |
| Bond Strength Concrete (ASTM D4541) | >3 MPa |
| Tensile Bond Strength Steel (ASTM D897) | 19 MPa |
| Modulus of Elasticity (ASTM C579) | 1 GPa |
| Flexural Strength (ASTM D790-18) | 66 MPa |
| Tensile Strength (ASTM D638-22) | 31 MPa |
| Tensile Lap Shear Strength (Steel to Steel) (ASTM D1002-00) | 17 MPa |
| Tensile Lap Shear Strength (Steel to Aluminium) (ASTM D1002-00) | 16 MPa |
| Tensile Lap Shear Strength (Aluminium to Aluminium) (ASTM D1002-00) | 14 MPa |
| Hardness (Shore D) (ASTM D2240-00) | 70 |
| Dielectric Strength | 10.7 kV/mm |
| Surface Resistivity (ASTM D257) | 10^12 Ohm |
| Volume Resistivity | 2.81 x 10^11 Ohm.cm |
| VOC (ASTM D3960) | 3 g/l |
| Part A Colour | White |
| Part B Colour | Light Yellow |
| Part A Specific Gravity (25°C) | 1.05-1.15 |
| Part B Specific Gravity (25°C) | 0.94-0.98 |
| Flash Point | >200°C |
Here are some common examples on where Megapoxy 69 used by our customers.
