3M™ Scotch-Weld™ Structural Adhesive Film AF 31

Ready to Fly
3M™ Scotch-Weld™ Structural Adhesive Film AF 31 provides excellent performance with easy-to-use shop handling properties. With good peel strength, AF 31 provides reliable, long-term durability and meets the specific challenges of metal-to-metal bonded structures.

Overlap Shear on Aluminum

The following 3M primer is compatible with AF 31:
3M™ Scotch-Weld™ Structural Adhesives Primer EC-2174

AF 31 supplies peel strength through a spectrum of environmental conditions and are easy to work with. Once cured it provides high bond strength from -67°F to 500°F (-55°C to 260°C) for use in challenging designs in multiple environments.

What is Structural Adhesive Film?
The fewer rivets you have in your aircraft the better. Structural adhesive films enable the designer to get more innovative with their parts, and reduce the overall number of rivets required on your structure. This thermosetting modified epoxy in film form can be used for bonding a wide variety of substrates, including metal, honeycomb and composite. Structural Adhesive Films come in a variety of weights and thicknesses, minimizing the weight while maintaining the structural integrity.

The films are available in supported versions, which are typically used for monolithic bonding or honeycomb sandwich. They are also available in unsupported form for reticulation onto honeycomb. These films can be cured from temperatures as low as 180°F to as high as 350°F. Because these films are less messy and don't required mixing, they offer efficiencies in the design process. They are easier to use than typical paste adhesives.

See More 3M Structural Adhesive Films

3M is on the Leading Edge of Innovation
Adhesive bonding enables a more lightweight structure because it allows you to use more lightweight composite, as opposed to the metallic materials that were used in previous designs. Structural adhesive films are employed anywhere you are trying to bond metal to composite. This offers good erosion performance while minimizing weight.

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 we execute our 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 Aerospace. Our 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 our products, we have a history of saving money by reducing waste, rework and time.