3M EC2216 B-A Aerospace High Performance Flexible Cold-Resistant Shock Resistant 90-Minute Set Epoxy

Product Name

- 3M EC2216 B-A Aerospace High Performance Flexible Cold-Resistant Shock Resistant 90-Minute Set Epoxy

Brief Description

- 3M Scotch-Weld Epoxy Adhesive EC-2216 B/A is a flexible, two-part, room temperature curing epoxy adhesive engineered for high peel and shear strength.- It is specifically tested and certified for aircraft and aerospace applications, maintaining bond strength in challenging environmental conditions, including cryogenic temperatures.

Popular Applications & Uses

- Structural bonding of aircraft components, such as fuselage, wings, and control surfaces.- Bonding interior panels and composite materials.- Composite repairs and edge sealing.- Component assembly and bonding electrical assemblies.- Rapid Aircraft On Ground (AOG) repairs in Maintenance, Repair, and Overhaul (MRO) environments.- Replacing mechanical fasteners, screws, rivets, and spot welds.- Cryogenic bonding applications where maintaining structural integrity at extremely low temperatures is crucial.

Industries that Commonly Use It

- Aerospace/Defense- Military (meets DOD-A-82720 standards)- General Manufacturing (for bonding various materials requiring high performance)

Special and Unique Features

- Excellent for cryogenic bonding applications, resistant to extreme cold temperatures down to -423°F (-252°C).- Exceptional resistance to shock, vibration, and flexing.- High peel and shear strength for strong, durable bonds in critical applications.- Flexible to withstand dynamic stresses and thermal cycling.- 90-minute work life at 75°F (24°C) allows for positioning and adjusting components.- Base and accelerator components have contrasting colors for easy identification and accurate mixing.- Room temperature curing with optional heat acceleration for faster cure times.- Meets MIL-A-82720 and DOD-A-82720 specifications, ensuring compliance for aerospace and military applications.- Electrically insulating (does not conduct).

Key Properties

- Product Type: Two-part epoxy adhesive.- Cure Type: Room temperature curing, can be accelerated with heat.- Mix Ratio (by volume): 2:3 (Part A:Part B).- Mix Ratio (by weight): 5:7 (Part A:Part B).- Working Life: Approximately 90 minutes at 75°F (24°C).- Handling Strength: Approximately 12 hours.- Full Cure Time: 7 days at 75°F (24°C); 30 minutes at 200°F (93°C) for accelerated cure.- Color: Gray (also available in translucent).- Service Temperature Range: -67°F to 250°F (-55°C to 121°C) or -423°F to +180°F (-252°C to +82°C).- Shear Strength: Up to 3200 psi (22.1 MPa) at 75°F (24°C).- Peel Strength: Approximately 25 piw.- Viscosity: High viscosity, Part A: 75,000–150,000 cP; Part B: 40,000–80,000 cP.- Shore Hardness: 55-60 Shore D.

Surface Compatibility

- Metals (e.g., steel, ferrous and stainless steel, aluminum, copper, brass).- Woods.- Plastics (many types, including aerospace-grade plastics).- Rubbers.- Masonry products.- Stone.- Concrete.- Ceramics.- Composite materials.

Known backups / known substitutes

- Araldite 2015- Permabond ET5401- Loctite EA9359.3

Comparison Note

- The 3M EC2216 B/A epoxy adhesive is specifically labeled, packaged, tested, and certified for aircraft and aerospace applications, distinguishing it from general-purpose epoxies.- Its formulation provides exceptional performance under extreme conditions, including cryogenic temperatures, high shock, and vibration, making it suitable for critical structural bonding where standard adhesives may fail.- It meets stringent military and aerospace specifications (MIL-A-82720, DOD-A-82720), ensuring reliability and compliance for demanding aviation and defense uses.