Infinity Bond MMA 421 Methacrylate Adhesive Overview

Infinity Bond MMA 421 is a high-strength, two-part methacrylate adhesive designed for precision bonding of metals, composites, and most plastics. Featuring a medium-fast working time of 13–17 minutes, it offers excellent versatility to meet the needs of various industrial and manufacturing workflows. Known for its superior impact resistance, minimal surface preparation, and reduced bond line visibility, MMA 421-BLK is an ideal solution for demanding applications where durability and aesthetics matter.

MMA 421 Features and Benefits

• Adaptable Working Time: 13–17 minute working time ideal for balancing application flexibility and production speed.
• No Primer Needed: Bonds effortlessly to most metals without additional surface treatments.
• Exceptional Durability: Stands up to harsh environments, ensuring permanent and reliable bonds.
• Non-Sagging Formula: Stays in place during application, even on challenging vertical or overhead surfaces.
• Impact and Fatigue Resistance: Delivers excellent performance under stress, making it perfect for high-demand projects.
• Smooth Finish: Reduced bond line read-through minimizes post-application refinishing, saving time and effort.

Specifications

• Model: MMA-421-BLK
  
• Type: Methyl Methacrylate Structural Adhesive
  
• Substrates:
  
  • Composites: Epoxy, Polyester/DCPD, Vinyl Ester, Gelcoats
    
  • Metals: Aluminum, Carbon Steel, Stainless Steel, Coated Metals
    
  • Thermoplastics: ABS, Acrylics, PVC/CPVC, Styrenics
    
• Color: Black
  
• Cartridge Size: 490 mL
  
• Mix Ratio: 10:1
  
• Working Time: 13 - 17 Minutes
  
• Fixture Time: 30 - 40 Minutes
  
• Density: 8.51 lb/gal (1.02 g/cc)
  
• Tensile Strength: >1700 PSI (12 Mpa)
  
• Maximum Tensile Elongation: >40 - 50%
  
• Tensile Modulus: >30,000 - 40,000 PSI (207-276)
  
• Lap Shear Strength: >2,300 PSI (16 MPa)
  
• Service Temperature: -40°F to 180°F (-40°C to 82°C)
  
• Application Temperature: 65°F to 80°F (18°C to 27°C)
  
• Storage Temperature: 65°F to 80°F (18°C to 27°C)
  
• Shelf Life: 9 Months from Date of Shipment

Note: All the above values are typical and are not meant to be used as specifications.