Applications

Plexus® MA2245

Brand: Plexus®

Package Sizes:

Cartridges:

  • 490 mL Cartridge

Bulk Containers:

  • 5-Gallon (20 L) Pails
  • 50-Gallon (200 L) Drums

Shelf Life:

  • 12 months for Part A (Adhesive) and 7 months for Part B (Activator)

Product Description:

Plexus® MA2245 is a two-part methacrylate adhesive designed for structural bonding of thermoplastic, metal, and composite assemblies. It requires minimal surface preparation and can fill gaps from 0.03 inches to 1.5 inches (final gap fill depends on laminate thickness and composition).

With a 10:1 mix ratio, MA2245 has a working time of 50 minutes at 75°F (23.9°C) and achieves 500 psi in 95 – 100 minutes and 1000 psi in 125 – 130 minutes at 75°F (23.9°C). The adhesive provides excellent fatigue endurance, impact resistance, and superior toughness.

MA2245 is available in blue or black colors and is supplied in cartridges, pails, or drums. It dispenses as a non-sagging gel.

Key Features:

Minimal Surface Preparation: Bonds many materials with little pre-treatment.
Large Gap Filling: Works in gaps up to 1.5 inches.
High Strength & Toughness: Provides excellent impact resistance and durability.
Excellent Fatigue Resistance: Maintains strength under cyclic loads.
Moderate Work Time: Provides 50 minutes of working life at 75°F (23.9°C).

Recommended Applications:

🔹 Marine Industry: Bonding composite and metal components in boats and marine vessels.
🔹 Transportation: Structural bonding of thermoplastic and composite panels in automotive, rail, and aerospace.
🔹 Industrial Equipment: General manufacturing applications requiring high durability​.

Typical Uncured Physical Properties:

Property Part A (Adhesive) Part B (Activator)
Color Off-White Black
Viscosity (cP x1000) 190 – 250 35 – 70
Density (g/mL) 0.99 1.07
Mix Ratio (by volume) 10 1
Mix Ratio (by weight) 9.40 1
VOC Content <1%  <1%

Typical Cured Physical Properties:

Property Value
Color Off-White
Shore D Hardness TBD
Elongation at Break 40 – 80%
Tensile Strength (ASTM D638) 2,160 – 2,640 psi (14.9 – 18.2 MPa)
Tensile Modulus 94 – 127 kpsi (645 – 872 MPa)
Gap Tolerance 0.03 – 1.5 in (0.75 – 38 mm)

Performance Characteristics:

Overlap Shear Strength (ASTM D1002, Typical Values)

Substrate Lap Shear Strength (psi/MPa) Failure Mode
Aluminum 6061 1,889 psi (13.0 MPa) Cohesive Failure (CF)
FRP 1,480 psi (10.2 MPa) Fiber Tear (FT)
Steel 1,710 psi (11.8 MPa) Cohesive Failure (CF)

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) 60 – 65 min 110 – 115 min 125 – 130 min 170 – 175 min
75°F (23.9°C) 50 min 80 – 85 min 95 – 100 min 125 – 130 min
90°F (32.2°C) 33 – 34 min 40 – 45 min 50 – 55 min 55 – 60 min

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