3M™ Scotch-Weld™ Structural Adhesive Film AF 555

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Structural adhesive film with long-term durability on honeycomb.

Offers pre-bond humidity performance on composite substrates

One year out time at ambient conditions

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  • Structural adhesive film with long-term durability on honeycomb
  • Offers pre-bond humidity performance on composite substrates
  • One year out time at ambient conditions
  • Excellent shop handling characteristics

Our 3M™ Scotch-Weld™ Structural Adhesive Film AF 555 encompasses a family of thermosetting modified epoxy adhesives in film form that provides long-term durability and meets specific challenges for metal and composite solid panel and honeycomb sandwich construction, where high fracture toughness is required.

Ready to Fly
3M™ Scotch-Weld™ Structural Adhesive Film AF 555 provides excellent performance with easy-to-use shop handling properties. These adhesive films are available in a variety of weights and carriers to meet a range of needs without imposing excess material costs. With high fracture toughness and peel strength, AF 555 provides a reliable, long-term bond suitable for composites, metals in solid panel and honeycomb sandwich fabrication. We also offer an unsupported version, which can be used for reticulation. It is also compatible with multiple substrates and primers. In addition, AF 555 exhibits excellent pre-bond humidity performance on composite substrates.

Metal to Metal — Overlap Shear

Test Temperature °F (°C) Scotch-Weld AF 555 Film U 0.030 Wt.PSI (MPa) Scotch-Weld AF 555 Film U 0.050 Wt.PSI (MPa) Scotch-Weld AF 555 Film U 0.080 Wt.PSI (MPa)
-67 (-55) 4776 (33) 4850 (33) 4770 (33)
75 (23) 5416 (37) 5634(39) 5765(40)
277(136) 2606 (18) 3016(21) 4355(30)
350 (177) 1571 (11) 1526(11) 2252(16)

The following 3M primers are compatible with AF 555:
Our heat-curing, easy handling film is designed to meet numerous customer specs in aerospace manufacturing. AF 555 supplies high fracture toughness through a spectrum of environmental conditions and is easy to work with. Once cured it provides high bond strength from -67°F to 325°F (-55°C to 163°C) for use in multiple designs through 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.

Multi-colored honeycomb panels for aircraft bonded with structural adhesive films.
3M adhesive films are designed to deliver superior mechanical performance in challenging conditions
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.

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. Creating efficiencies, reducing process times and lowering aircraft weight is how we execute our never-ending mission to offer best-in-class adhesives, sealants and other products that effectively reduce costs on multiple fronts.

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3M maintaints partnerships with every major aircraft OEM in the world. Find your spec today.


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