Plexus MA550 (35000X) Non-Sag Gel, UV Stable White 45-Minute MMA Adhesive for Marine and Underwater bonding of Plastics Metals & Composites

Product Name

- Plexus MA550 (35000X) Non-Sag Gel, UV Stable White 45-Minute MMA Adhesive for Marine and Underwater bonding of Plastics Metals & Composites

Brief Description

- Plexus MA550 is a two-part methacrylate adhesive engineered for high-strength, structural bonding of thermoplastics, metals, and composite assemblies. It is particularly recognized for its robust performance in marine and underwater environments, offering excellent chemical and wet resistance, and maintaining its white color due to UV stability.

Popular Applications & Uses

- Structural bonding in the marine industry, including marine gelcoats, FRP, and various plastics.- Bonding of diverse substrates such as metals (aluminum, stainless steel, raw steel, coated metals), composites (DCPD, FRP, Gelcoat, Phenolics, Epoxy Based Composites, RIM), and thermoplastics (ABS/ABS Blends, Acrylics, PBT, Polycarbonate, Rigid PVC, TPUs, Styrenics, Vinyl esters).- Secondary bonding applications where high fatigue endurance, impact resistance, and toughness are critical.- Underwater bonding applications.

Industries that Commonly Use It

- Marine- Transportation/ Specialty Vehicle- General Manufacturing- Metal Fabrication- Plastic Fabrication- Construction/ Building Services (for structural bonding of composites and metals)

Special and Unique Features

- Non-sag gel consistency for controlled application.- UV stable white color that resists fading or degradation under extended UV exposure.- Excellent resistance to a wide range of chemicals including acids, bases (3-10 pH), salt solutions, and hydrocarbons.- Requires virtually no surface preparation for many substrates, simplifying application.- Provides high elongation and excellent stress distribution for durable bonds.- Achieves fast and consistent strength development at room temperature.- Forms a toughened, shock-resistant bond.- Offers a unique combination of excellent fatigue endurance, outstanding impact resistance, and superior toughness.

Key Properties

- Chemical Base: Methyl Methacrylate (MMA)- Mix Ratio: 10:1 by volume- Working Time: 40-50 minutes at 74°F (23°C)- Fixture Time: 70-75 minutes to achieve approximately 75% of ultimate strength at 74°F (23°C)- Operating Temperature: -40°F to 250°F (-40°C to 121°C)- Gap Filling: 0.03 in. to 0.375 in. (0.75mm to 10mm)- Color: Bright White- Tensile Strength: 1,800 – 2,400 psi (12.4 – 16.5 MPa)- Shear Strength: 1,200-1,800 psi (8.9 – 12.4 MPa)- Mixed Density: 8.19 lbs/gal (0.98 g/cc)- Viscosity (uncured): Adhesive: 130,000 – 160,000 cP; Activator: 30,000 – 70,000 cP

Surface Compatibility

- Thermoplastics: ABS/ABS Blends, Acrylics, PBT, Polycarbonate, Rigid PVC, TPUs, Styrenics, Vinyl esters- Metals: Aluminum, Stainless Steel, Raw Steel, Coated Metals (powder coated or E-coated)- Composites: DCPD, FRP, Gelcoat, Phenolics, Epoxy Based Composites, RIM

Known backups / known substitutes

- Infinity Bond MMA 550- Other MMA adhesives from manufacturers such as 3M, Adhesive Systems Inc., SCIGRIP, Sika, LOCTITE, and ASI.- General categories of adhesives like Epoxy and Urethane.

Comparison Note

- Plexus MA550 is a recognized, high-performance brand in the adhesive market. While it offers exceptional properties, its cost can be higher compared to some alternative products like Infinity Bond MMA 550, which provides similar capabilities but may differ in work time and handling time.