MMA 320 Black Flexible Methacrylate Adhesive for Structural Bonding

Infinity Bond MMA 320 Black is a flexible, high-strength structural methacrylate adhesive formulated for bonding metals, plastics, and composites in demanding applications. This 10:1 mix ratio adhesive offers an 8 to 12 minute working time and reaches handling strength in 18 to 25 minutes. It provides excellent adhesion to substrates like fiberglass, aluminum, stainless steel, and ABS while allowing for movement between dissimilar materials — ideal for applications subject to thermal cycling or vibration. The black coloration offers clear visibility for inspection, part alignment, and aesthetic contrast.

Note: There is also an MMA 320 off-white color for standard bonding applications.

Key Features and Benefits

• Flexible Bonding Formula: Absorbs movement and stress between dissimilar substrates
• Black Pigment for Visual Control: Enhances bond line visibility for inspection and aesthetic contrast
• Medium-Set Working Time: 8–12 minute working time with 18–25 minute fixture time
• High Strength with High Elongation: Greater than 100% elongation for applications under stress or vibration
• Excellent Material Compatibility: Bonds fiberglass, ABS, aluminum, stainless steel, and more
• Standard Cartridge Sizes: Available in 50 ml and 490 ml cartridges for use with 10:1 ratio dispensing systems

Specifications

• Series: MMA 320
• Type: Methyl Methacrylate Structural Adhesive
• Color: Black
• Mix Ratio: 10:1
• Substrates: Recommended for bonding Aluminum, Stainless Steel, Fiberglass, ABS, PVC, Acrylic, and other Engineered Plastics
• Working Time: 8 to 12 minutes (at 75°F / 24°C)
• Fixture Time: 18 to 25 minutes (at 75°F / 24°C)
• Can Be Moved In: 25 to 30 minutes
• Operating Temperature: 65°F to 85°F (18°C to 30°C)
• Gap Filling: Up to 0.375 inches
• Mixed Density: 8.1 lbs/gal (0.96 g/cc)
• Elongation: Greater than 100%
• Flash Point: 51°F (11°C) – See SDS for full safety information
• Cartridge Size: 50 ml and 490 ml
• Shelf Life: 1 Year (unopened at room temperature)

Note: Not recommended for low-energy surfaces like polyethylene or polypropylene.