Applications

Plexus® MA920

Brand: Plexus®

Package Sizes:

  • Cartridges:
    • 400 mL Cartridge
  • Bulk Containers:
    • 5-Gallon (20 L) Pails
    • 50-Gallon (200 L) Drums

Shelf Life:

  • 13 months for Part A (Adhesive) and 10 months for Part B (Activator)

Product Description

Plexus® MA920 is a low-odor, two-part methacrylate adhesive designed for structural bonding of thermoplastics, metals, and composite assemblies. It is formulated with a 10:1 mix ratio, a working time of 4 to 6 minutes, and reaches 75% of ultimate strength in 15 to 18 minutes at 74°F (23°C).

This adhesive is a breakthrough in methacrylate adhesive technology, providing high strength, excellent fatigue endurance, and outstanding impact resistance while maintaining a low-odor formulation. MA920 is blue when mixed and is supplied in ready-to-use cartridges, pails, or drums. It dispenses as a non-sagging gel.


Key Features

  • Fast Cure Speed: Achieves handling strength in 15-18 minutes.
  • Low Odor Formula: Ideal for sensitive working environments.
  • High Strength & Toughness: Provides high cohesive strength and durability.
  • Minimal Surface Preparation: Bonds many materials without extensive surface prep.
  • Wide Material Compatibility: Bonds aluminum, stainless steel, ABS, acrylic, PVC, fiberglass, and more.
  • Excellent Impact & Fatigue Resistance: Durable under dynamic loads.

Recommended Applications

  • Transportation: Bonding composite and metal components in automotive, marine, and aerospace.
  • Construction: Structural bonding of composite and thermoplastic panels.
  • Industrial Equipment: Bonding metals and plastics in general manufacturing.
  • Sporting Goods: Used in assembly of lightweight and impact-resistant components.

Typical Uncured Physical Properties

Property Part A (Adhesive) Part B (Activator)
Color Off-White Blue
Viscosity 80,000 – 120,000 cP 35,000 – 80,000 cP
Density 0.97 g/mL 1.07 g/mL
Mix Ratio (by volume/weight) 10:1 / 9.00:1
Peak Exotherm Temperature (10g mass) ~224°F (106°C)
Peak Exotherm Time (10g mass) 10 – 11 minutes
VOC Content < 1%

Typical Cured Physical Properties

Property Value
Color Blue
Shore D Hardness 70
Elongation at Break 30 – 50%
Tensile Strength 2,385 – 2,915 psi (16.4 – 20.1 MPa)
Tensile Modulus 77 – 104 kpsi (527 – 714 MPa)
Gap Tolerance 0.03 – 0.375 in (0.75 – 9.5 mm)

Performance Characteristics

Overlap Shear Strength (ASTM D1002, Typical Values)

Substrate Lap Shear Strength (psi/MPa) Failure Mode
Aluminum 6061 1,635 psi (11.3 MPa) Cohesive Failure (CF)
Stainless Steel 1,555 psi (10.7 MPa) Cohesive Failure (CF)
Gel Coat 1,769 psi (12.2 MPa) Cohesive Failure (CF)
Carbon Fiber 1,501 psi (10.4 MPa) Cohesive Failure (CF)
PVC 1,094 psi (7.5 MPa) Substrate Failure (SF)

Cure Profile at Different Temperatures

Temperature Work Time Time to 50 psi Time to 500 psi Time to 1000 psi
60°F (15.6°C) 11 – 12 min 20 – 21 min 21 – 23 min 27 – 30 min
75°F (23.9°C) 4 – 6 min 16 – 17 min 17 – 20 min 26 – 31 min
90°F (32.2°C) 3 – 4 min 10 – 11 min 12 – 13 min 14 – 15 min

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