Product Introduction
3M™ Scotch-Weld™ Epoxy Adhesive EC-3531 B/A FR is a self-extinguishing, two-part flame retardant epoxy adhesive. This adhesive meets the 14 CFR 25.853 (a) Burn Test requirements and has a work life of 4-8 minutes after mixing. It is ideal for many applications requiring a self-extinguishing structural epoxy adhesive system.
3M™ Scotch-Weld™ Epoxy Adhesive EC-3531 B/A FR is excellent for applications requiring a self-extinguishing, flame retardant epoxy adhesive on surfaces including steel, aluminum, plastics, rubber, and glass. This two-part epoxy adhesive is supplied in a dual syringe plastic cartridge as part of the 3M™ EPX™ Applicator System for minimal waste and professional results. The mix ratio is 1:1 and the adhesive provides a 4 to 8 minute work life to allow time to adjust fit prior to setting. The adhesive is fully cured in 24-48 hours at 73°F (23°C).
What Are Epoxy Adhesives?
3M™ epoxy adhesives are part of the class of adhesives called “structural adhesives,” which also includes polyurethane and acrylic adhesives. Epoxy adhesives are typically formulated with reactive components (Base and Accelerator) that cure when mixed to form a solid plastic material. 3M provides epoxy adhesives in multiple formats to support your processing needs:
Two Part – The 3M™ Scotch-Weld™ Epoxy Adhesive EC-3531 B/A FR is a two-part adhesive. In this format, the Base and Accelerator are stored separately which enables the adhesive to have a long shelf life even when stored at room temperature. When stored in the original, unopened container at the storage conditions suggested, this product has a shelf life of 15 months from the date of shipment from 3M. These materials are available in cartridges for use with the 3M™ EPX™ Applicator System, enabling you to simultaneously meter, mix and apply two-part adhesives. For larger scale operations, you can purchase these in bulk. Because these parts are mixed at point of use, you can reduce waste by saving non-mixed unused material for a later job.
One Part – In this format, 3M does the mixing for you and ships it frozen. You store it in a freezer, then remove and thaw it when you’re ready to use it.
Adhesive Films – In this one-part format, 3M not only does the mixing for you, but also turns it into a film that can be specifically cut to size and placed into your bond line. 3M offers a variety of films in different weights/thicknesses and supports. These films must be stored frozen.
In a two-part epoxy adhesive, once the two parts are mixed in their specified ratio, they begin the curing process and offer a limited working time where the adhesive can be applied and the two surfaces positioned as needed. Similarly, in a one-part adhesive there is a limited out time after which material is thawed during which it must be used. This work life or out time lasts anywhere from a few minutes to 48 hours or longer.
In general, epoxy adhesives provide high shear and peel strengths and have good environmental resistance. These adhesives are preferred for their ease of use, mechanical strength, and chemical resistance. Depending on the formulation, epoxy adhesives can be flexible or rigid, transparent or opaque, quick setting or slow setting, high flow or low flow, room temperature or elevated temperature cure. Epoxy adhesives are among the strongest adhesives available, making them well-suited for jobs requiring strength and durability.
Our Best for Your Best
3M is proud to partner with organizations across the spectrum of aerospace and related industries. Enabling efficiencies, reducing process times, and lowering aircraft weight is how 3M executes its never-ending mission to offer best-in-class adhesives, sealants, surface protection products, and composite resins that effectively reduce costs on multiple fronts. Professionals across the industry know the numerous advantages of 3M Automotive and Aerospace Solutions. The brand is widely recognized for the highest standards of quality and performance, adding value to the final results. By engineering reliability, longevity, and value into all of its products, 3M has a history of saving money by reducing waste, rework, and time.
3M™ Scotch-Weld™ Epoxy Adhesive EC-3531 B/A FR Features
- Self-extinguishing, flame retardant adhesive passes 14 CFR 25.853 (a) Burn Test requirements
- 4-8 minute work life after mixing
- Applies easily with convenient cartridges, resulting in minimal waste
- 1:1 mix ratio simplifies mixing
- Does not contain intentionally added brominated or antimony-based flame retardants
3M™ Scotch-Weld™ Epoxy Adhesive EC-3531 B/A FR Applications
- Bonding steel, aluminum, plastics, rubber, and glass
- Aerospace and automotive structural bonding projects
- Applications requiring flame retardant performance
- Situations requiring minimal adhesive waste and easy application
- Repairs and assemblies needing quick set and high strength
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
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Adhesive Type | Epoxy |
| Container Size (Imperial) | 1.64 fl oz, 6.76 gal, 10 fl oz |
| Container Size (Metric) | 37.85 mL, 48.5 L, 200 mL |
| Cure Temperature | Room Temperature |
| Features | Flame Retardant |
| Product Form | Kit |
| Time to Handling Strength | 30 min |
