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When static cracks compromise concrete integrity, or porous substrates require deep, permanent reinforcement, a standard epoxy often won't reach. Megapoxy HX is the extra low viscosity, 100% solids liquid resin formulated precisely for these challenges. It penetrates deeply to form high-strength, lasting repairs in concrete, masonry, and timber, securing structural elements or preparing surfaces for the long term.
Megapoxy HX was engineered to fill a critical gap: providing a high-strength, solvent-free epoxy that can penetrate hairline cracks and deeply impregnate porous materials. Its extra low viscosity ensures it flows into the tightest spaces, curing to form a permanent, hydrophilic bond. This formulation makes it ideal for repairing static cracks in concrete, strengthening timber, or preparing masonry for durable finishes, offering superior strength and chemical resistance where conventional epoxies cannot reach.
Megapoxy HX requires precise mixing at a 3:1 Part A to Part B ratio by volume. Thorough manual or mechanical mixing is critical to achieving full performance and avoiding discolouration. Application techniques vary from simple gravity penetration for minor cracks to low-pressure or pressure injection methods using crack injection balloons or nipples. For maximum adhesion, substrates must be clean, dry, and free from coatings, requiring mechanical abrasion or acid etching for concrete, and grit blasting for metals. Cleanup of tools and equipment uses Megapoxy Thinners.
Megapoxy HX commonly functions as the injectable resin in multi-step concrete crack repair systems. It is typically applied after the crack has been prepared and sealed on the surface. For instance, in a common sequence, a non-sag epoxy paste like Megapoxy PM Adhesive is first used to cap the crack and attach injection ports, creating a sealed system for Megapoxy HX to be injected under pressure. This ensures the low-viscosity resin is directed into the crack and fully penetrates without leakage, forming a robust, permanent bond from within.
Megapoxy HX is an extra low viscosity, thin liquid resin, specifically formulated for its ability to penetrate static cracks and porous materials through injection or capillary action. In contrast, Megapoxy PM is a complementary non-sag epoxy paste system, explicitly designed for use as a surface sealant or crack cap during the Megapoxy HX crack injection process. PM holds the HX in place and creates the necessary pressure chamber, while HX performs the deep, structural repair. Selecting between them depends on whether the task requires deep penetration into fine gaps (HX) or surface sealing and structural patching (PM).
Megapoxy HX's extra low viscosity of 200 cps is formulated for deep penetration into very fine concrete cracks. This allows for thorough impregnation and permanent repair, even where higher viscosity products would not reach.
No. For maximum adhesion, the concrete surface must be dry. After surface preparation, allow concrete to dry for 24 hours before application. This ensures optimal bond strength and performance.
Inaccurate mixing ratios or insufficient mixing will compromise the cured system. This can lead to lower physical properties, unsatisfactory cure, or discolouration. Always adhere to the 3 Part A to 1 Part B volume ratio and mix thoroughly.
Yes, Megapoxy HX is suitable as a low viscosity laminating resin for fibreglass. Its thin consistency ensures full wet-out of the material, which is critical for achieving strong, void-free laminates.
| Application | Key benefit | Primary trades |
|---|---|---|
| Concrete crack repair | Extra low 200 cps viscosity ensures deep penetration into fine cracks for permanent structural repair, superior to concrete at 140 MPa compressive strength. | Concrete repairers, Civil engineers, Restorers |
| Porous substrate impregnation | Effectively seals and strengthens porous materials like masonry and timber by capillary action, enhancing durability. | Heritage restorers, Builders, Masonry specialists |
| Low viscosity laminating | Achieves full wet-out for robust fibreglass work, creating strong, void-free laminates with 59 MPa tensile strength. | Fibreglass fabricators, Marine repairers, Composites trades |
| Surface hardening | Increases the wear resistance and durability of concrete and masonry surfaces through deep penetration. | Floor specialists, Industrial painters, Maintenance crews |
Signal Word: Danger
Wear safety shoes, nitrile rubber gloves, safety glasses, and a suitable respirator. Always wash hands before smoking, eating, drinking, or using the toilet. Wash contaminated clothing before reuse.
Natural ventilation is adequate under normal use conditions. Avoid inhalation of vapour, mist, or aerosols.
Store in a cool, dry, well-ventilated place, out of direct sunlight, and away from foodstuffs and incompatible materials. Keep containers closed and upright, checking regularly for leaks. Store locked up. Dispose of material and containers in accordance with local, regional, and national regulations. Avoid contaminating waterways.
Proper surface preparation is crucial for Megapoxy HX to achieve its documented bond strengths and ensure a lasting repair or bond.
Surface prep: Ensure concrete is free from grease and oil. Clean with an industrial heavy-duty degreaser if needed. Remove surface laitance by mechanical abrasion (scabbling, grit blasting, or grinding). If mechanical abrasion is not feasible, acid etch with a 1:1 hydrochloric acid and water solution at 0.5 L/m². Allow 10 minutes to react, then wash thoroughly and scrub to remove loose sand. Allow to dry for 24 hours. For maximum adhesion, the concrete must be surface dry.
Primer: Not required. Megapoxy HX is designed for direct application to prepared concrete.
Surface prep: Grit blast to AS 1627.2.2002 standard. If grit blasting is not possible, mechanically abrade to a clean, bright metal finish. After abrasion, degrease the surface by flooding with an industrial-grade degreaser. Wire brushing is insufficient and will yield minimal adhesion.
Primer: Not required. The product is designed to bond directly to prepared metal surfaces.
Surface prep: It is critical to remove all existing coatings prior to bonding. Bonding to coated surfaces will result in inferior bond strengths compared to bonding directly to a properly prepared substrate.
Primer: Not required after complete removal of coatings and proper substrate preparation.
| Property | Value |
|---|---|
| Mixing Ratio By Volume | 3 Part A to 1 Part B |
| Work Time at 25°C | 60 minutes |
| Minimum Application Temperature | 10°C |
| Viscosity Part A at 25°C | 400 - 600 cps |
| Viscosity Part B at 25°C | 15 - 20 cps |
| Mixed Viscosity at 25°C | 200 cps |
| Specific Gravity Part A at 25°C | 1.10 - 1.12 |
| Specific Gravity Part B at 25°C | 0.95 - 0.97 |
| Mixed Specific Gravity at 25°C | 1.07 |
| Colour Part A | Clear |
| Colour Part B | Clear |
| Colour Mixed | Clear |
| Yield Compressive Strength - ASTM C579 | 70 MPa |
| Ultimate Compressive Strength - ASTM C579 | 140 MPa |
| Bond Strength Concrete - ASTM D4541 | >3 MPa |
| Tensile Bond Strength Steel - ASTM D897 | 20 MPa |
| Modulus of Elasticity - ASTM C579 | 0.055 GPa |
| Flexural Strength - ASTM D790 | 80 MPa |
| Tensile Strength - ASTM D638 | 59 MPa |
| Tensile Lap Shear Strength - ASTM D1002 | 15 MPa (steel to steel) |
| Hardness - Shore D - ASTM D2240 | 75 |
| Dielectric Strength (kV/mm) | 24.4 |
| Surface Resistivity (Ohm) - ASTM D257 | 10¹² |
| Volume Resistivity (Ohm.cm) | 1.23 x 10¹¹ |
| VOC (g/l) - ASTM D3960 | 6 g/l |
| Thin Film Cure at 25°C | 6-8 hours |
| Minimum Cure Time at 15°C | 48 hours |
| Minimum Cure Time at 25°C | 24 hours |
| Minimum Cure Time at 35°C | 12 hours |
Here are some common examples on where Megapoxy HX used by our customers.
