Product Introduction of 3M Scotch-Weld Epoxy Adhesive EC-2216 B/A
3M Scotch-Weld Epoxy Adhesive EC-2216 B/A Gray is a flexible, two-part, room-temperature curing epoxy adhesive that delivers high shear and peel strength, making it an excellent solution for demanding aerospace applications. It maintains bond strength even at low temperatures and withstands harsh environmental conditions.
This high-performance epoxy adhesive is ideal for replacing mechanical fasteners, screws, rivets, and spot welds. It provides excellent adhesion on metals and many plastics and can be dispensed in duo-pak cartridges for use with the 3M™ EPX™ Applicator System, ensuring minimal waste and professional-grade results. Featuring a 2:3 mix ratio, it offers a 90-minute work life to allow proper positioning and adjustment before setting. The adhesive reaches handling strength in about 12 hours and fully cures within 7 days at room temperature (72°F / 22°C), with the option for accelerated curing using heat. It is particularly suitable for bonding applications requiring cryogenic temperature performance and is widely used for composite laminate edge sealing.
Epoxy adhesives, such as 3M™ Scotch-Weld™ EC-2216 B/A Gray, are part of the structural adhesive category, alongside polyurethane and acrylic adhesives. They are typically composed of reactive components—Base and Accelerator—that cure when mixed, forming a solid plastic material. 3M offers epoxy adhesives in multiple formats to suit different processing needs:
Two Part: This format stores the Base and Accelerator separately, allowing a long shelf life at room temperature. Available in duo-pak cartridges for use with the 3M™ EPX™ Applicator System or in bulk quantities for larger jobs. This enables on-demand mixing, reducing waste by preserving unused portions.
One Part: Pre-mixed and shipped frozen, requiring storage in a freezer until needed. Once thawed, the adhesive has a limited working time for application.
Adhesive Films: Pre-mixed and converted into a film format that can be cut to specific sizes and placed directly onto bond lines. These films require frozen storage and are available in various weights, thicknesses, and supports.
In two-part adhesives, the curing process starts immediately after mixing. These adhesives offer a defined working time during which components can be aligned and bonded. Likewise, one-part adhesives have a specific out time after thawing before they must be applied. Work times can range from a few minutes to over 48 hours.
Epoxy adhesives are favored for their exceptional mechanical strength, high shear and peel strengths, and excellent resistance to chemicals and environmental stressors. They can be formulated to be flexible or rigid, transparent or opaque, fast- or slow-setting, and capable of curing at either room or elevated temperatures, making them highly versatile for critical bonding applications.
3M remains a trusted partner in the aerospace and related industries, providing advanced adhesives, sealants, and surface protection products that reduce process times, improve efficiencies, and lower overall aircraft weight. Known for its high standards of quality and performance, 3M delivers products that offer long-term reliability, reducing waste and minimizing rework costs across industries.
3M Scotch-Weld Epoxy Adhesive EC-2216 B/A Gray Features
- 2:3 mix ratio simplifies mixing
- 90-minute work time allows for positioning and adjusting for fit prior to setting
- Available in bulk or duo-pak cartridges
- Flexible to withstand vibration
- Outstanding environmental performance
- High peel and shear strength for strong bonds in critical applications
- Excellent for creating bonds that can be used at cryogenic temperatures
- Widely used for composite laminate edge sealing
3M Scotch-Weld Epoxy Adhesive EC-2216 B/A Gray Applications
- Bonding metals and many plastics in aerospace and industrial applications
- Replacing mechanical fasteners, screws, rivets, and spot welds
- Structural bonding requiring high peel and shear strength under harsh conditions
- Applications requiring cryogenic temperature resistance
- Composite laminate edge sealing
- Projects needing extended work time for precise alignment and bonding
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
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| Property | Value |
|---|---|
| Adhesive Type | Epoxy |
| Container Size (Imperial) | 1 gal, 1 pt, 1 oz, 2 qt |
| Container Size (Metric) | 0.47 L, 0.95 L, 3.79 g, 56.7 L |
| Cure Rate | 7 days |
| Cure Temperature | Room Temperature |
| Density | 1.3 g/cc, 1.3 Gram per Liter |
| Percent Volatile | 0.06 % |
| Time to Handling Strength | 8 hr – 12 hr |
| Work Life | 90 min |
