MMA 420 Black Flexible Methacrylate Adhesive for Fast-Set Applications

Infinity Bond MMA 420 Black is a fast-setting, flexible structural methacrylate adhesive designed for bonding metals, plastics, and composites in demanding applications. With a 10:1 mix ratio and working time of just 3 to 7 minutes, this adhesive is ideal for quick production environments or assemblies that require speed and strength. It forms durable, impact-resistant bonds to substrates like aluminum, stainless steel, ABS, and fiberglass — all with minimal surface preparation. The black formulation enhances visibility for inspection, part alignment, or aesthetic integration.

Note: There is also an MMA 420 off-white option for standard bonding applications.

Key Benefits

• Fast-Setting Formula: 3–7 minute working time with fixture strength in 9–15 minutes
• Flexible Bond Line: Ideal for assemblies exposed to thermal cycling or vibration
• Black Pigment for Visual Control: Enhances visibility for inspection and alignment
• Strong, Durable Adhesion: Bonds metals, fiberglass, and engineered plastics with minimal prep
• Wide Gap Filling: Fills gaps up to 0.50 inches for uneven or rough bonding surfaces
• Available Sizes: Offered in 50 ml and 490 ml cartridges for use with 10:1 dispensers

Specifications

• Series: MMA 420
• 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: 3 to 7 minutes (at 75°F / 24°C)
• Fixture Time: 9 to 15 minutes (at 75°F / 24°C)
• Can Be Moved In: 15 to 20 minutes
• Operating Temperature: 65°F to 85°F (18°C to 30°C)
• Gap Filling: Up to 0.50 inches
• Mixed Density: 8.1 lbs/gal (0.96 g/cc)
• 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.