Description

Plexus MA420 Blue Methacrylate Structural Adhesive – 490ml

Plexus MA420 is a two-part, toughened methacrylate structural adhesive engineered for high-strength bonding of metals, thermoplastics and composite materials in demanding industrial applications. With a 10:1 mix ratio, ultra-fast working time and rapid strength development, MA420 delivers exceptional impact resistance, fatigue performance and long-term durability.

This adhesive is widely regarded as a standard solution for composite bonding in the transportation industry, where minimal surface preparation, high toughness and fast throughput are critical. Supplied in a blue colour for excellent bead visibility, Plexus MA420 allows accurate application and easy quality control during assembly.

The adhesive is supplied in a ready-to-use 490ml cartridge and is compatible with manual or pneumatic dispensing guns, making it suitable for both workshop and production environments.

To find out more about structural adhesives read our guide Structural Adhesives UK: Selection Guide, Common Mistakes & Trade Applications

✅ Key Performance Benefits

• Structural-grade methacrylate adhesive for demanding bonded assemblies

• Fast working time: approx. 4–6 minutes

• Rapid strength build: achieves approx. 75% of final strength in 15–18 minutes

• Outstanding impact resistance & toughness

• Excellent fatigue endurance for vibration and dynamic loading

• Minimal surface preparation required

• Blue colour for improved bead visibility & quality control

• Ready-to-use 490ml cartridge for production efficiency

✅ Typical Applications

• Composite panel and GRP bonding

• Transportation manufacturing and vehicle body assembly

• Plastic-to-metal bonding

• Structural enclosure fabrication

• Industrial equipment and housing assembly

• Marine and composite structures

✅ Compatible Substrates

Plexus MA420 provides strong, durable bonds to a wide range of materials, including:

• Aluminium

• Painted and coated metals

• Plated metals

• Sheet metal

• Stainless steel

• Cold rolled steel

• ABS plastic

• Acrylic plastics

• Polyester plastics

• Vinyl (PVC)

• Fibreglass (GRP)

• Gelcoats

• Polyurethane composites

• Phenolic composites

✅ Technical Summary

• Brand: ITW Plexus

• Product Code: MA420

• Chemistry: Two-part Methacrylate (MMA)

• Mix Ratio: 10:1

• Working Time: 4–6 minutes

• Strength Development: ~75% in 15–18 minutes

• Colour: Blue

• Packaging: 490ml dual cartridge

• Dispensing: Manual or pneumatic applicator

✅ Why Choose Plexus MA420?

Plexus MA420 combines:

• High structural strength

• Superior impact and peel resistance

• Long-term fatigue durability

• Excellent multi-substrate bonding

• Fast production throughput

This makes it a trusted choice for transportation, composites, marine and industrial fabrication, where vibration, shock loads and thermal movement are present.