Description
Plexus MA300 Adhesive (50ml) – Fast Cure MMA for Metal, Plastic & Composites
Plexus MA300 methacrylate adhesive is a fast-curing, two-part MMA structural adhesive designed for permanent, high-strength bonding of metals, composites, and thermoplastics. It is widely used across industrial, marine, automotive, and fabrication applications where speed, strength, and long-term durability are essential.
With a working time of 10–15 minutes and handling strength typically achieved within 20–25 minutes, Plexus MA300 is ideal for rapid assembly and repair work. It provides excellent impact, peel, and fatigue resistance, even when exposed to vibration, moisture, fuels, and thermal cycling.
Supplied in a convenient 50ml dual cartridge or 400ml cartridge, Plexus MA300 methacrylate adhesive is perfect for small-scale production, maintenance, and precision bonding, and is compatible with manual dispensing guns and static mixer nozzles.
🔍 What is Plexus MA300 used for?
Plexus MA300 is a fast-curing MMA structural adhesive designed for bonding metal to plastic, composites, GRP and thermoplastics where high strength and vibration resistance are required. It is commonly used in marine, automotive and fabrication industries for permanent structural bonding.
For alternative structural bonding options, see our range of Plexus MMA adhesives or permabond MMA including Permabond TA4611.
✅ Key Features & Benefits
-
Fast-curing two-part methacrylate (MMA) adhesive
-
Working time: 10–15 minutes
-
Handling strength in approx. 20–25 minutes
-
Exceptional structural bond strength
-
Excellent resistance to impact, peel & fatigue
-
Withstands vibration & thermal cycling
-
Minimal surface preparation required
-
Resistant to moisture, fuels & many chemicals
-
50ml dual cartridge for precision application
-
Suitable for manual dispensing guns
🧱 Typical Applications
-
Bonding metals, GRP, ABS, PVC, acrylics & composites
-
Marine fabrication & repair
-
Automotive panels, trims & structural parts
-
Sign manufacturing & display assembly
-
Industrial equipment fabrication
-
Composite component bonding
If you’re working with metal and plastic materials, you may also find our guide on strongest glue for metal to plastic useful.
🧪 Technical Overview
-
Base Chemistry: Methacrylate (MMA) two-part system
-
Mix Ratio: 1:1 by volume
-
Working Time: 10–15 minutes
-
Fixture / Handling Time: ~20–25 minutes
-
Shear Strength: Up to 18 MPa (steel to steel)
-
Operating Temperature: -55°C to +120°C
-
Colour: Off-white
-
Packaging: 50ml dual cartridge
✅ Why Choose Plexus MA300?
Plexus MA300 is the ideal solution when you need fast fixture speed, minimal surface preparation, and true structural performance in a compact, easy-to-handle format. It is trusted by professionals for strength-critical bonding where failure is not an option.
Read our blog Plexus MA300 vs MA310: Which Structural Adhesive Is Right for Your Project?
| Feature | MA300 | MA310 |
|---|---|---|
| Working time | 10–15 mins | 15–18 mins |
| Speed | Faster | Slower |
| Best for | Small fast jobs | Larger assemblies |
Plexus MA300 FAQ
What is Plexus MA300 used for?
Plexus MA300 is a two-part methacrylate structural adhesive used for high-strength bonding of metals, composites, plastics, GRP, and thermoplastics. It is commonly used in marine fabrication, automotive repair, sign making, industrial assembly, and composite bonding where strong, permanent joints are required.
How strong is Plexus MA300?
Plexus MA300 provides structural bond strength of up to approximately 18 MPa (steel to steel) and offers excellent resistance to impact, vibration, peel forces, and fatigue. It is designed for load-bearing applications where conventional adhesives or sealants are not strong enough. Read our guide for more information regarding structural bonding vs bolting
What is the working time of Plexus MA300?
Plexus MA300 has a working time of approximately 10–15 minutes at room temperature (23°C). Handling strength is typically achieved in around 20–25 minutes, making it suitable for fast assembly and repair work.
Do I need a dispensing gun for Plexus MA300?
Yes. Plexus MA300 is supplied in a 50ml dual cartridge and requires a compatible 50ml dispensing gun and static mixing nozzle to correctly mix the two components during application.
What materials can Plexus MA300 bond?
Plexus MA300 can bond a wide range of materials, including:
- Steel and aluminium
- GRP / fibreglass
- ABS, PVC, acrylic and many thermoplastics
- Composite panels
- Powder-coated and painted metals
- Wood and laminates
Minimal surface preparation is normally required compared to epoxy adhesives. For hard to bond, low surface energy materials, such as PP or PE you should consider using Permabond TA4611.
What is the difference between Plexus MA300 and MA310?
Plexus MA300 has a faster fixture time and is ideal for quick assembly, while Plexus MA310 has a longer working time, making it better suited to larger bonding areas or complex assemblies where more positioning time is needed.
Plexus MA300 working time around 2-3 minutes, Plexus MA310 working time 19-20 minutes
See our guide: Plexus MA300 vs MA310 – Which Structural Adhesive Should You Use?
Is Plexus MA300 waterproof and chemical resistant?
Yes. Once cured, Plexus MA300 provides excellent resistance to moisture, fuels, oils, and many chemicals, making it suitable for marine, automotive, and industrial environments where durability is essential.
What temperature can Plexus MA300 withstand?
Plexus MA300 typically has an operating temperature range of approximately -55°C to +120°C once fully cured, making it suitable for applications exposed to heat, cold, and thermal cycling.
Is Plexus MA300 better than epoxy?
In many structural bonding applications, Plexus MA300 methacrylate adhesive can outperform epoxy adhesives because it requires less surface preparation, cures faster, and provides better impact and fatigue resistance. MMA adhesives like Plexus are often preferred for bonding composites and metals in marine and automotive industries.
Is Plexus MA300 a structural adhesive?
Yes. Plexus MA300 is a true structural methacrylate adhesive designed for load-bearing joints where high strength, durability, and long-term performance are required.
