For bonding mitre joints, natural stone, and porcelain where a visible glue line would ruin the finish, Megapoxy 63 is a translucent, high-strength epoxy gel. This solvent-free adhesive allows for thin film applications and can be tinted with pigment pastes to match the exact colour of the stone, masonry, or ceramic substrate.
Megapoxy 63 is a 100% solids epoxy adhesive gel that does not shrink during cure, preventing tension in tight mitred joins and repairs. Its thick gel texture blends easily and spreads readily with a notched trowel, making it practical for filling stone holes, repairing chipped stone edges, and bonding tile to masonry. It cures to a highly rigid finish with high shock resistance and chemical resistance, protecting structural bonds on stone, bricks, and concrete from impact and exposure.
Megapoxy 63 is suitable for bonding, filling, and repairing across a range of heavy building materials:
For natural stone and porcelain, lightly abrade the bonding areas. Cross hatching or biscuiting smooth surfaces will improve mechanical adhesion. Ensure all surfaces and pin fixing holes are completely clean, dry, and dust-free.
For concrete substrates, remove all grease, oil, and laitance. Laitance must be removed via mechanical abrasion or acid etching before applying the adhesive.
Clean all tools and mixing equipment immediately after use with Megapoxy Thinners. Wear disposable rubber gloves during mixing and application to maintain proper industrial hygiene.
Yes, Megapoxy 63 is formulated for high-strength bonding of natural stone, including critical miter joints. It provides a non-shrinking bond with excellent tensile and compressive strengths, reducing the risk of joint failure in finished stone work.
No, it is not recommended for bonding over existing coatings. The TDS explicitly states that bonding to coated surfaces results in inferior bond strength. All coatings must be removed to ensure a direct, high-strength bond to the prepared substrate.
Megapoxy 63 achieves a bond strength exceeding 3 MPa on concrete (ASTM D4541). This provides a robust, permanent connection, making it suitable for demanding applications on concrete substrates after proper preparation.
Megapoxy 63 is a hazardous chemical requiring careful handling; it causes skin irritation and serious eye damage. Always wear safety shoes, nitrile gloves, and eye/face protection. Ensure adequate ventilation and avoid skin contact or inhalation.
The minimum cure time for Megapoxy 63 is 24 hours at 25°C. At 15°C, expect 48 hours for minimum cure, while at 35°C, it cures in 12 hours. Plan your work around these temperatures for optimal results and to avoid premature loading.
| Application | Key benefit | Primary trades |
|---|---|---|
| Bonding miter joints in natural stone | Delivers very high-strength, permanent bonds that resist yellowing, crucial for exposed, high-value stone installations. Does not shrink, maintaining precise joint lines. | Stonemasons, Tilers, Benchtop Fabricators |
| Adhering natural stone, bricks, and ceramics to masonry | Achieves bond strengths over 3 MPa on concrete, ensuring durable adhesion even in thin film applications. Superior to concrete in compressive (120 MPa) and tensile (36 MPa) strengths. | Tilers, Bricklayers, Stonemasons |
| Filling holes and voids in stone | Provides a 100% solids, non-shrinking repair that can be coloured with Megapoxy pigment pastes for aesthetic matching. Maintains the structural integrity of the stone. | Stonemasons, Restoration Specialists |
| Repairing chipped or damaged stone edges | Forms a hard, chemical-resistant repair with a Shore D hardness of 89. This restores the edge profile and durability, preventing further damage. | Stonemasons, Repair Technicians |
Prepare surfaces by cleaning, degreasing, and mechanically abrading where required. Ensure substrates are dry, dust-free, and free from coatings before applying the adhesive.
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 clothing, nitrile gloves, and eye/face protection (safety glasses). A suitable respirator may be required in poorly ventilated areas. Always wash hands thoroughly after handling, before eating, drinking, or smoking.
Ensure natural ventilation is adequate under normal use conditions. Avoid breathing dust, fume, gas, mist, vapours, or spray.
For poisoning, contact a doctor or Poisons Information Centre (Australia 131 126, New Zealand 0800 764 766).
Store in a cool, dry, well-ventilated place, out of direct sunlight and away from foodstuffs and incompatible materials (oxidising agents). Keep containers upright and tightly closed when not in use. Shelf life is a minimum of 2 years in unopened kits. This material is a Scheduled Poison (S5 - Caution) and must be stored, maintained, and used in accordance with relevant regulations. Dispose of contents and containers in accordance with local, regional, national, and international regulations.
Proper surface preparation is critical for Megapoxy 63 to achieve its specified bond strengths and ensure long-term performance.
Surface prep: Lightly abrade the bonding areas. For smooth surfaces, cross-hatching or biscuiting can improve adhesion. The surface must be clean, dry, and free of dust. Ensure pin fixing holes are clean and dust-free.
Primer: Not required. Focus on mechanical preparation and cleanliness.
Surface prep: Concrete surfaces must be free from grease and oil. If necessary, use an industrial-grade degreasing agent. Laitance must be removed by mechanical abrasion or acid etching to expose sound concrete.
Primer: Not required.
Surface prep: All existing coatings must be removed prior to bonding. Bonding to coated surfaces will result in significantly reduced bond strength.
Primer: Not applicable; coatings must be removed.
| Property | Value |
|---|---|
| Mixing Ratio by Volume | 2 Part A to 1 Part B |
| Work Time at 25C | 30 minutes |
| Minimum Cure Time at 15C | 48 hours |
| Minimum Cure Time at 25C | 24 hours |
| Minimum Cure Time at 35C | 12 hours |
| Minimum Application Temperature | 10C |
| Maximum Operating Temperature | 100C |
| Color Part A | Translucent |
| Color Part B | Translucent |
| Appearance Mixed | Translucent |
| Compressive Strength ASTM D695-23 | 120 MPa |
| Bond Strength Concrete ASTM D4541 | >3 MPa |
| Flexural Strength ASTM D790-17 | 85 MPa |
| Tensile Strength ASTM D638-22 | 36 MPa |
| Hardness - Shore D ASTM D2240-00 | 89 |
Here are some common examples on where Megapoxy 63 used by our customers.
