For civil engineering applications requiring rapid structural strength, Megapoxy 108 is a rapid-setting liquid epoxy binder formulated for splicing bridge piles and executing high-strength repairs to precast concrete. Its fast compressive and impact strength development allows pile driving operations to resume with minimal downtime, achieving compressive strengths exceeding 95 MPa after 2 hours at 22°C.
Megapoxy 108 is a hydrophilic resin. This chemistry allows the binder to cure reliably in the presence of moisture, preventing failure when bonding damp concrete substrates. When mixed as a liquid binder, it provides a clear, pourable system. For structural repairs on precast concrete, it can be combined with silica 50N sand to produce a rapid-setting, high-strength epoxy mortar that resists heavy mechanical loads.
To produce a rapid-setting epoxy mortar for precast concrete repairs, premix one volume of mixed Megapoxy 108 liquid (4 parts Part A to 1 part Part B) in a plastic bucket. While mixing, gradually add three volumes of silica 50N sand. Mix using a slow-speed drill (approximately 200 rpm) fitted with a propeller-type stirrer to prevent excessive air entrapment.
Clean all mixing implements, trowels, and application tools immediately after use with Megapoxy Thinners before the epoxy cures.
It delivers rapid, high compressive and flexural strength essential for structural applications. Tests show 95 MPa compressive strength after 2 hours at 22°C, reaching an ultimate 120 MPa, allowing quick project progression.
Yes, Megapoxy 108 is a hydrophilic resin. This means it cures effectively even when moisture is present, which is common in civil engineering environments.
First, combine 4 parts 'A' to 1 part 'B' by volume. Then, gradually add three volumes of silica 50N sand to this mixed epoxy, stirring with a slow-speed drill (around 200 rpm) until uniform.
This product is classified as 'Danger'. Wear safety shoes, gloves (nitrile rubber recommended), and safety glasses. Avoid skin and eye contact, and ensure good ventilation. Refer to the SDS for full details before use.
| Application | Key benefit | Primary trades |
|---|---|---|
| Splicing bridge piles | Achieves 95 MPa compressive strength in 2 hours, allowing pile driving to resume quickly and minimising project delays. | Civil engineers, piling contractors |
| High-strength repair of precast concrete (as mortar) | Forms a rapid-setting mortar with 120 MPa ultimate compressive strength, ensuring durable and structural repairs to critical concrete elements. | Concrete repair specialists, precast manufacturers |
| Critical civil infrastructure bonding | Hydrophilic resin cures effectively even in damp conditions, maintaining bond integrity in challenging site environments. | Heavy construction contractors, infrastructure maintenance |
The Engineering Challenge: Joining sections of precast concrete piles requires a jointing material that can cure fast enough to withstand the immense impact forces of pile driving without causing extensive project delays.
The System-Based Solution with Megapoxy 108: Create a rapid-set, high-impact mortar by mixing Megapoxy 108 with silica 50N sand. Pour the mortar into the prepared pile splice joint. Within 2 hours, the joint will have developed sufficient compressive strength (>95 MPa) for pile driving to safely resume, saving critical time on the project schedule.
Best Practice Note: Due to the extremely short 8-minute work time at 25°C, all components (epoxy, sand, mixer, and personnel) must be organised and ready for immediate mixing and placement.
The Engineering Challenge: A structural precast panel has been damaged and requires a high-strength repair before it can be lifted and installed. Waiting 24-72 hours for a traditional repair mortar to cure is not feasible.
The System-Based Solution with Megapoxy 108: Prepare the damaged area by removing all loose concrete. Form the repair and apply a mortar made from Megapoxy 108 and silica sand. The repair will achieve its full 120 MPa strength in just 6 hours, allowing the panel to be safely handled, transported, and installed on the same day.
Best Practice Note: For mixing the mortar, use a slow-speed drill (approx. 200 rpm) with a propeller-style stirrer to ensure the aggregate is thoroughly wetted out without introducing excessive air into the mix.
SIGNAL WORD: DANGER
Wear safety shoes, protective gloves (nitrile rubber recommended), and safety glasses with side shields. Suitable respiratory protection may be required in poorly ventilated areas.
Use only in well-ventilated areas. Local exhaust ventilation or appropriate respirators may be necessary to maintain air concentrations below exposure standards. Vapours are heavier than air; prevent concentration in confined spaces or sumps.
Store in a cool, dry, well-ventilated place, out of direct sunlight, away from foodstuffs, incompatible materials, and sources of heat/ignition. Store locked up. Keep containers closed and upright. Dispose of contents and container according to local, regional, and national regulations. Both parts are Scheduled Poison Schedule 5 (Caution).
Proper surface preparation is crucial for Megapoxy 108 to achieve its documented performance in high-strength applications. This prevents adhesion failure under load.
Surface prep: Surfaces must be clean, sound, and free from loose material, dust, grease, and other contaminants. Mechanical preparation may be required to achieve a clean, open pore profile.
Primer: Not required. Megapoxy 108 is a hydrophilic resin and will cure in the presence of moisture, but surfaces should be sound.
| Property | Value |
|---|---|
| Product Name | Megapoxy 108 |
| Product Description | Rapid set liquid epoxy binder for civil engineering applications requiring early development of high strength. Hydrophilic resin. |
| Mixing Ratio (A:B) | 4:1 by volume |
| Working Time (25°C) | 8 minutes |
| Initial Cure (25°C) | 30 minutes |
| 90% Cure (25°C) | 2 hours |
| Full Cure (25°C) | 6 hours |
| Compressive Strength (2 hours, 22°C) | 95 MPa |
| Ultimate Compressive Strength | 120 MPa |
| Ultimate Flexural Strength | 55 MPa |
| Mortar Additive | Silica 50N sand (3 volumes per 1 volume mixed epoxy) |
| Part A Form | Clear Liquid |
| Part A Colour | Clear to Light Pale |
| Part A Odour | Phenolic |
| Part A Specific Gravity (25°C) | 1.10-1.12 |
| Part A Flash Point | >200 °C |
| Part B Form | Clear Liquid |
| Part B Colour | Clear to Pale |
| Part B Odour | Amine |
| Part B Specific Gravity (25°C) | 0.96-0.98 |
| Part B Flash Point | 148 °C |
| VOC Content | Nil g/Litre |
| Poison Schedule | Schedule 5 |
Here are some common examples on where Megapoxy 108 used by our customers.
