3M Scotch-Weld DP2216 & 2216 B-A Gray - High Performance Flexible Cold-Resistant Shock Resistant 90-Minute Set Epoxy

Product Name

3M Scotch-Weld DP2216 & 2216 B-A Gray - High Performance Flexible Cold-Resistant Shock Resistant 90-Minute Set Epoxy

Brief Description

3M Scotch-Weld DP2216 & 2216 B-A Gray is a high-performance, two-component, room temperature curing industrial epoxy adhesive designed for applications requiring flexible, high-strength bonds. It offers exceptional resistance to extreme cold (cryogenic temperatures), shock, vibration, and flexing, making it ideal for challenging environments and bonding dissimilar materials.

Popular Applications & Uses

- Cryogenic bonding applications where bonded agents experience temperature extremes.- Potting applications, especially for parts subject to thermal cycling, such as solar panels or electronic components.- Bonding components in transportation and general aerospace where vibrations and movement are common.- Military bonding applications, including parts on movable transports.- Structural bonding of lightweight materials like aluminum and composites in automotive.- Repair and assembly of high-performance equipment in sporting goods (e.g., golf clubs, skis).- Bonding ceramic, most plastics, rubber, wood, and glass to metal.- Attaching various substrates to masonry and stone.- Sealing and coating applications.

Industries that Commonly Use It

- Aerospace/Defense- Automotive Service/Repair- Construction/ Building Services- Distributers & Resellers- Energy- General Manufacturing- Government & Military- LED/Electronics- Marine- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle

Special and Unique Features

- High performance and flexible bonds.- Exceptional resistance to extreme shock, vibration, and flexing.- Excellent for cryogenic bonding applications, withstanding temperatures down to -423°F (-252°C) without becoming brittle.- Maintains strong bonds under expansion, contraction, and limited movement, ideal for dissimilar surfaces with differing thermal expansion coefficients.- Good retention of strength after environmental aging.- Electrically insulating properties.- Meets DOD-A-82720 specification.

Key Properties

- **Type:** Two-component epoxy adhesive- **Color:** Gray (Part A: Gray, Part B: Off-White, cures to Gray)- **Mix Ratio (by volume):** 2:3 (Base:Accelerator)- **Work Life:** Approximately 90 minutes at room temperature (75°F/24°C)- **Full Cure Time:** 7 days at room temperature, or 30 minutes at 200°F (93°C)- **Viscosity:** Thick liquid / High viscosity (80,000 to 100,000 cPs)- **Shear Strength:** Up to 3,200 psi at 72°F (24°C)- **Peel Strength:** 25 piw- **Shore Hardness:** 55-60 Shore D- **Temperature Resistance:** -423°F (-252°C) to +180°F (82°C)

Surface Compatibility

- Metals (e.g., steel - ferrous and stainless, aluminum)- Woods- Plastics (many types)- Rubbers- Masonry products (e.g., stone, concrete, ceramics)- Glass

Known backups / known substitutes

- Araldite 2015- Permabond ET5401- Loctite EA9359.3- Permabond ET5428 (thixotropic two-part epoxy for extreme temperatures)- Permabond MT-modified epoxies (more flexibility)- MMA (methylmethacrylate) adhesives (for faster cure, toughened with rubber for high bond strength and thermal resistance)- Sylgard 184 Silicone Elastomer (flexible, good dielectric properties)- Master Bond EP37-3FLFAO (resistance to thermal cycling)

Comparison Note

3M Scotch-Weld DP2216 B-A Gray is chemically identical to 3M™ Scotch-Weld™ Aerospace Epoxy Adhesive EC-2216 B/A. The key difference is that EC-2216 B/A is specifically labeled, packaged, tested, and certified for aircraft and aerospace applications, meeting AS9100 quality management standards. The non-aerospace rated 2216 B/A may be used for aerospace applications if proper Certificates of Test are issued and material meets all aircraft manufacturer's specification requirements.