PLEXUS MA422 Two-part Methacrylate Adhesive- 5 Gallon Pail Activator- Blue IT159

Product Name

PLEXUS MA422 Two-part Methacrylate Adhesive- 5 Gallon Pail Activator- Blue IT159

Brief Description

Plexus MA422 is a two-part methyl methacrylate (MMA) structural adhesive engineered for high-strength bonding of diverse materials such as composites, thermoplastics, and metals. It cures quickly at room temperature, forming durable bonds with exceptional fatigue endurance, impact resistance, and toughness.

Popular Applications & Uses

- Structural bonding of composite, thermoplastic, and metal assemblies.- Replacing welding and mechanical fasteners in various applications.- Bonding panels, brackets, and bodywork components in transportation.- Joining aluminum, steel, and powder-coated parts in metal fabrication.- Bonding ABS, acrylic, PVC, or polycarbonate in plastic fabrication.- Attaching internal fixtures, hulls, and deck liners in marine vessels.- Erecting signs, shop windows, and light structures.

Industries that Commonly Use It

- Aerospace/Defense- Automotive Service/Repair- Construction/ Building Services- Energy- Fabrication- General Manufacturing- Marine- Metal Fabrication- Plastic Fabrication- Sign & Display- Transportation/ Specialty Vehicle

Special and Unique Features

- Requires virtually no surface preparation for many applications.- Non-sag thixotropic dispensing.- Excellent fatigue endurance, outstanding impact resistance, and superior toughness.- Forms strong bonds between dissimilar materials.- Good chemical resistance to hydrocarbons, acids, bases (pH 3-10), and salt solutions.- Room temperature cure.- Gap-filling capability (0.03 in. – 0.375 in. or 0.75 mm – 9.5 mm).

Key Properties

- Mix Ratio (by volume): 10:1 (Adhesive: Activator).- Working Time: 17 – 24 minutes.- Fixture Time: 35 – 40 minutes (to 75% ultimate strength at 74°F/23°C).- Tensile Strength: 2,700 – 3,000 psi (18.6 – 20.7 MPa).- Shear Strength: 1,600 – 2,300 psi (11.0 – 15.9 MPa).- Tensile Elongation: 75 – 100%.- Operating Temperature: -40°F to 250°F (-40°C to 121°C).- Color (mixed): Blue.- Viscosity (Adhesive A): 100,000-130,000 cP.- Viscosity (Activator B): 35,000-70,000 cP.

Surface Compatibility

- Composites: DCPD, FRP, Gelcoat, Phenolics, Epoxy Based Composites, RIM.- Thermoplastics: ABS/ABS Blends, Acrylics, PBT, Polycarbonate, Rigid PVC, TPUs, Styrenics, Urethanes (general), Vinyl Esters.- Metals: Aluminum, Stainless Steel, Raw Steel, Powder coated or E-coated Metals.- Other: Magnets, Glass, Wood.

Known backups / known substitutes

- Maven MMA422.- Infinity Bond MMA 422.- Other Methyl Methacrylate Adhesives (MMAs) from brands like 3M, ASI, Bostik, Devcon, LOCTITE, LORD, SCIGRIP, Sika.

Comparison Note

Plexus MA422 is a high-performance structural adhesive often used to replace welding and mechanical fasteners due to its strong, durable bonds and ability to bond dissimilar materials. Compared to some epoxies, MMAs like MA422 are more flexible, cure faster at room temperature, tolerate less surface preparation, and are better at bonding dissimilar materials with different thermal expansion rates. While Plexus is a popular brand, alternatives like Infinity Bond MMA 422 may offer similar or even superior performance at a lower cost.