Plexus® MA590 is a high-performance, two-part methacrylate adhesive designed for structural bonding of thermoplastics, metals, and composites. Mixed at a 1:1 ratio, MA590 offers a working time of 90-105 minutes at 23°C (74°F). It achieves lap shear values of 500 psi in 5 hours and 1000 psi in 6.5 hours at a 0.75 mm bond line. Ideal for large marine structures needing long open times, MA590 is commonly used in bonding stringers and liners in large fiberglass boats with bond lines up to 1 inch thick. This adhesive combines excellent fatigue endurance, impact resistance, and superior toughness. MA590 is gray when mixed and available in 400 ml cartridges, 20-liter pails, and 200-liter drums.
Key Features:
- Extra long working time: 90-105 minutes
- Excellent gap filling and thixotropic properties
- Easy 1:1 mix ratio
- High strength and elongation
Key Substrates:
- Composites: DCPD, FRP, Gelcoat, Phenolics, Epoxy Composites, RIM
- Coated Metals: Powder-coated, E-coated metals
- Thermoplastics: ABS, Acrylics, PBT, Polycarbonate, Rigid PVC, TPU
- Raw Metals: Aluminum, Stainless Steel, Raw Steel
Typical Uncured Properties | Part A | Part B |
Color | White | Black |
Mix Ratio by Volume | 1.00 | 1.00 |
Mix Ratio by Weight | 1.00 | 1.00 |
Component Density, g/ml | 0.93 | 1.03 |
Component Viscosity, cP x1000 | 140 – 230 | 165 – 230 |
VOC’s during cure, % | < 0.5 | |
Shelf Life, Months | 7 |