3M DP6310NS Multi-Material Composite Urethane Adhesive, Green 1:1 Mix Ratio

3M Scotch-Weld DP6310NS is a two-part, non-sag urethane adhesive designed for bonding a wide variety of materials, particularly composites, plastics, and metals, often with minimal surface preparation. Its toughened and flexible properties make it an excellent choice for multi-material assemblies that may experience vibration, impact, or differential thermal expansion. The green color provides a helpful visual indicator that the adhesive components have been mixed correctly.

Popular Applications & Uses
- Bonding composite panels to metal frames in trucks, buses, and specialty vehicles.
- Attaching stiffeners to composite sheets in marine and industrial applications.
- Assembling plastic and composite components in signage and architectural elements.
- General product assembly involving dissimilar materials like plastic-to-metal.
- Repairing cracks or bonding patches on composite parts like SMC and FRP.

Industries that Commonly Use It
- Transportation (Truck, Bus, Rail)
- Specialty Vehicle Manufacturing
- Signage and Commercial Displays
- General Industrial and Composite Fabrication
- Marine and Recreation

Special and Unique Features
- Bonds well to many composites, plastics, and metals with little to no surface preparation.
- Toughened and flexible formula provides excellent impact resistance and fatigue life.
- Non-sag (NS) viscosity ensures the adhesive stays in place on vertical surfaces.
- The 1:1 mix ratio simplifies the application process.
- Good resistance to environmental factors and many common industrial solvents.

Key Properties
- Base: Urethane
- Color: Green
- Mix Ratio: 1:1 by volume
- Work Life: 8-12 minutes at 73 F (23 C)
- Time to Handling Strength: 2-3 hours
- High peel and shear strength for robust performance.

Materials Bonded
- Composites: Sheet Molding Compound (SMC), Fiber Reinforced Plastic (FRP), Carbon Fiber
- Plastics: ABS, Polycarbonate (PC), Rigid PVC, Acrylic
- Metals: Aluminum, Cold Rolled Steel, Stainless Steel
- Painted Metals, Glass, and Wood

Cure Information
- Mix Ratio: 1:1 by volume
- Work Life (Open Time): 8-12 minutes
- Time to Handling Strength: 2-3 hours at room temperature.
- Full Cure: 24-48 hours at room temperature.
- Cure can be accelerated with mild heat.

Known backups / known substitutes for this product
- Plexus MA300 Methyl Methacrylate Adhesive
- Lord 406/19 Acrylic Adhesive

Comparison Note
- While 3M DP6310NS is a urethane, it is often used in similar applications as structural acrylics like Plexus MA300 or Lord 406. The key difference is the chemistry. Urethanes like DP6310NS tend to offer better flexibility and peel strength, making them ideal for bonding dissimilar materials with different expansion rates. Acrylics like Plexus MA300 often provide higher ultimate shear strength and faster cure times but can be more rigid. The choice between them depends on whether flexibility or ultimate strength and speed is the priority.