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Achieving high-strength, permanent bonds between diverse construction materials presents a unique challenge. Standard fillers often sag, lack robust adhesion, or fail in demanding conditions. Megapoxy PM delivers a purpose-built solution: a non-sag, two-part epoxy paste for structural bonding and filling across concrete, metal, stone, and fibreglass, ensuring integrity even in cold and damp environments.
Megapoxy PM is formulated to provide an unyielding, permanent bond and structural repair where standard adhesives or fillers fall short. This non-sag epoxy paste maintains its form on vertical and overhead surfaces, making it ideal for critical applications requiring precision and strength superior to concrete. It adheres and cures under adverse conditions, including cold and damp environments, extending its usability on challenging job sites.
Megapoxy PM mixes at a straightforward 1:1 ratio by volume. Once mixed, it offers a 45-minute work time at 25°C, providing ample opportunity for precise placement. Apply it at temperatures no lower than 10°C. Cure time is temperature-dependent, ranging from 48 hours at 15°C to 12 hours at 35°C. For optimal adhesion, prepare surfaces meticulously: grit blast metal to AS CK 9.4 Class 3 and mechanically abrade or acid etch concrete to remove laitance. Ensure all existing coatings are removed as they compromise bond strength. Clean tools and excess material with Megapoxy Thinners.
Megapoxy PM frequently serves as the final, rigid component in multi-stage crack and joint treatment detailing systems. After initial preparation and often after applying a flexible sealant like Adheseal PU25, Megapoxy PM is applied to adhere joint bands, seal cracks rigidly, or cap injection ports. This positioning ensures a robust, permanent closure or bond, completing the structural repair sequence with a material designed for strength and durability. Within concrete membrane and tiled systems, it acts as a rigid filler for gaps or cracks before subsequent layers.
Yes, Megapoxy PM is a non-sag paste suitable for vertical and overhead applications. Its creamy texture ensures it stays in place during curing, preventing slumping or runoff on surfaces like concrete columns or fibreglass articles.
No, when properly mixed, Megapoxy PM is formulated not to stain or discolour white or light-coloured marble and ceramics. This makes it suitable for bonding natural stones where aesthetic integrity is critical.
Apply Megapoxy PM at a minimum temperature of 10°C. The product is designed to adhere and cure reliably even in cold and damp conditions, though cure times will extend at lower temperatures.
Megapoxy PM delivers high-strength permanent bonds with a compressive strength of 80 MPa and a tensile bond strength to steel of 20 MPa. Its bond strength to concrete exceeds 3 MPa, indicating it is stronger than the concrete substrate itself.
No, it is essential to remove all coatings before bonding with Megapoxy PM. Bonding to coated surfaces will result in significantly inferior bond strengths compared to direct application on a properly prepared, bare substrate.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bonding natural stone and ceramics | Does not stain or discolour white or light-coloured materials, providing a secure, aesthetic bond. | Stonemasons, tilers, fabricators |
| Vertical and overhead concrete repairs | Non-sag formulation ensures the paste stays in place, even on vertical and overhead surfaces, reducing rework. | Concrete repairers, builders, precast installers |
| High-strength bonding for precast concrete and metal | Achieves permanent bonds with 80 MPa compressive strength and 20 MPa tensile bond to steel, often stronger than the substrate. | Precast manufacturers, structural engineers, metal fabricators |
| Grouting bolts and flush-filling screws | High compressive strength provides secure anchoring, while its filling capability handles countersunk fastenings. | Steel erectors, general builders, concreters |
| Repair of fibreglass articles and concrete pipes | Adheres and cures reliably under adverse conditions, including cold and damp environments, for durable repairs. | Plumbers, marine repairers, civil contractors |
| Chemical-resistant bonds and repairs | Provides excellent chemical resistance, extending the service life of repairs in harsh environments. | Industrial maintenance, chemical plant operators |
Ensure all substrates are prepared according to the Adhesion Profile. Surfaces must be sound, clean, dry, and free of all contaminants to ensure a permanent, structural bond.
This is a critical step for achieving the product's specified strength and non-staining properties. Inaccurate mixing will lead to cure failure.
Measure exactly 1 Part A to 1 Part B by volume. Use calibrated mixing containers to ensure accuracy.
On a clean board or in a mixing bucket, combine the two parts. Mix thoroughly with a spatula or mechanical mixer (for larger volumes) until the paste is a 100% uniform colour with no streaks visible.
Apply the mixed paste to the prepared substrate using a trowel or spatula.
For bonding, apply to one or both surfaces and press together. For repairs or gap filling, trowel the paste into the void, ensuring no air pockets are trapped. The non-sag formula will hold on vertical and overhead surfaces.
Clean all tools, implements, and spills *before* the epoxy cures. Use Megapoxy Thinners for effective cleanup.
Use disposable rubber gloves to protect hands and maintain proper industrial hygiene during mixing and application.
Store Megapoxy PM in a cool, dry place. For detailed information on safe handling, first aid, and disposal, refer to the Megapoxy PM Safety Data Sheet.
Correct surface preparation is critical for achieving the documented strength and durability of Megapoxy PM. Improper preparation can lead to bond failure.
Surface prep: Ensure concrete is free from grease, oil, and laitance. Clean with a heavy-duty degreaser if needed. Remove surface laitance by mechanical abrasion such as scabbling, grit blasting, or grinding. If mechanical methods are not possible, acid etch by mixing concentrated hydrochloric acid with an equal volume of water, spreading at 0.5 L/m², allowing 10 minutes to react, then washing thoroughly and scrubbing. Allow 24 hours to dry. For maximum adhesion, the concrete must be surface dry.
Primer: Not required. The product is designed to bond directly to prepared concrete.
Surface prep: Grit blast metals to AS CK 9.4 - 1964 Class 3 finish. If grit blasting is not possible, mechanically abrade the surface to achieve a clean, bright metal finish. Degrease the surface by flooding with an industrial-grade degreaser after abrasion. Wire brushing alone is not sufficient and will provide minimal adhesion.
Primer: Not required. The product is designed to bond directly to prepared metal.
Surface prep: All existing coatings, including paint or galvanizing, must be entirely removed. For concrete, this can involve flame-cleaning, scutching, diamond grinding, or scabbling. For metals, use a good quality paint stripper followed by grit blasting or grinding to a bright metal finish. Bonding to coated surfaces will compromise adhesion.
Primer: Not applicable. Coatings must be removed for proper bonding.
| 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 | 70°C |
| Colour Part A | White |
| Colour Part B | White or Dark Grey |
| Appearance Mixed | White or Grey |
| Compressive Strength (ASTM D695-23) | 80 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) | 86 Shore D |
| Coefficient Of Linear Thermal Expansion Mean | 70.4 x 10^-6 (mm/mm/°C) |
| Dielectric Strength 50Hz @25°C | 190 Kv/cm |
| VOC Content | Very Low |
| Flash Point | Above 200°C |
Here are some common examples on where Megapoxy PM used by our customers.
