Structures & Airframes

Strength Without the Weight

Bond and Seal Aerospace Structures

Lightweight Materials for Maximum Integrity

Cabin Interiors

Structures & Airframes › Sub-Application

Cabin Interiors

Aircraft interiors combine lightweight sandwich panels, thermoplastics, metals, fabrics and decorative surfaces into structures that must survive service loads while meeting strict fire-safety and weight requirements.

Adhesives and sealants are used for honeycomb panel bonding, inserts, edge closeout, bracket attachment, seating components, thermoplastic bonding and local sealing. Product selection is driven by substrate compatibility, FST or FR requirements, density, working time and production throughput.

modern aircraft cabin interior during manufacturing with sidewall panels seating structures and overhead components being assembled, no passengers, 800x800
Interior Assembly Areas
Honeycomb Panels
Brackets & Inserts
Seating
Thermoplastics
Sidewalls & Monuments
Sealing & Finishing

Where Interior Materials Are Used

Honeycomb Panel Bonding

FST/FR structural adhesives join face sheets, cores, closeouts and local reinforcements in lightweight cabin panels.

Insert Potting

Potting and core reinforcement compounds distribute loads around inserts used to attach furniture, monuments and hardware.

Thermoplastic Bonding

Interior adhesives join thermoplastic trim and molded parts to metal or composite structures without adding mechanical fasteners at every location.

Seating & Surrounds

Adhesives support edge filling, bracket bonding, core splicing and local structural assembly in seating structures and surrounds.

Interior Sealing

Flexible aerospace sealants can close seams, protect joints and accommodate movement in selected cabin and cargo-area applications.

Decorative Attachment

Lower-density bonding solutions may attach decorative elements while balancing aesthetics, weight, process speed and service durability.

Key Cabin Requirements

FST / FR Performance

Applicable flame, smoke, toxicity and heat-release requirements must be confirmed for the specific interior construction and aircraft program.

Low Density

Adhesive and filler density matters because interior material usage is repeated across large cabin areas.

Room-Temperature Processing

Ambient-cure or mild-heat processes can reduce oven demand and simplify assembly of large interior structures.

Substrate Diversity

One cabin can combine aluminum, honeycomb, composite laminates, thermoplastics, fabrics and coatings, so adhesion must be validated on the actual substrate stack.

Cycle Time

Mixing, open time, handling strength and cure speed directly affect interior production throughput and rework.

Clean Finish

Squeeze-out, surface staining and visible bondlines must be controlled where cabin aesthetics are part of the finished product.

Featured Products

3M Scotch-Weld EC-9300 B/A FST aerospace interior adhesive product placeholder
 

3M Scotch-Weld EC-9300 B/A FST

Two-part room-temperature-curing epoxy designed for aircraft interior materials including metals and honeycomb panels. 3M states it meets FAR/JAR 25.853 and ABD0031 FST/heat-release requirements.

View Technical Data →
3M Scotch-Weld 7246-2 B/A FST structural adhesive product placeholder
 

3M Scotch-Weld 7246-2 B/A FST

3M-recommended FST structural adhesive for aerospace thermoplastic bonding and seating applications, including bonding thermoplastics to metal and composite surfaces.

View Cabin Solutions →
3M Scotch-Weld AF 3074 FST core splice film product placeholder
 

3M Scotch-Weld Core Splice Film AF 3074 FST

FST core-splice adhesive film recommended by 3M for aircraft cabin structures where repeatable film application and cabin fire-performance requirements are part of the design.

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3M Scotch-Weld EC-3542 B/A FR epoxy adhesive product placeholder
 

3M Scotch-Weld EC-3542 B/A FR

Flame-retardant epoxy adhesive recommended by 3M for aircraft cabin structures and seating bonding/attachment applications.

View Seating Solutions →
Dow DOWSIL EA-3838 fast adhesive product placeholder
 

Dow DOWSIL EA-3838 Fast Adhesive

Two-part fast room-temperature-cure silicone adhesive/sealant. Dow lists aerospace uses including cargo-door, light and edge sealing and general maintenance sealing.

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Dow DOWSIL 93-076 RF aerospace silicone sealant product placeholder
 

Dow DOWSIL 93-076 RF

Two-part high-performance silicone elastomer recognized by Dow for aerospace use, providing high-temperature adhesive/sealing capability and flexibility from -65°C to +260°C.

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Featured Supplier Spotlight

3M

3M has a particularly broad aircraft-interior portfolio covering FST/FR paste adhesives, core-splice films, thermoplastic bonding, insert/core applications, seating, sealants and protective tapes.

Dow

Dow aerospace silicone adhesives and sealants add flexible sealing, environmental resistance and movement accommodation in selected interior and aircraft assembly areas.

Henkel

Henkel's broader aerospace adhesive portfolio can support structural and assembly requirements; exact cabin-interior FST approval should be verified product-by-product rather than inferred from brand or chemistry alone.

FAQ

Frequently Asked Questions

What does FST mean in aircraft interiors?

FST refers to flame, smoke and toxicity performance. Depending on the part and aircraft program, heat-release requirements may also apply. Compliance has to be confirmed for the specific material and construction.

Why are honeycomb panels so common in cabin structures?

Sandwich panels can provide high bending stiffness at low mass. Adhesives are used to bond face sheets to core and to reinforce or close out local areas where hardware is attached.

Can a general structural epoxy be used inside the cabin?

Not automatically. Mechanical strength alone does not establish compliance with cabin fire-performance requirements. The exact adhesive and panel construction must satisfy the applicable specification and qualification requirements.

What matters when bonding thermoplastic interior parts?

The specific polymer, surface condition, coating or texture, joint stress and cabin fire requirements all matter. Adhesion should be tested on the actual molded substrate rather than assumed from a generic plastic category.

Need Help Selecting Aircraft Interior Bonding Materials?

Krayden can help narrow interior materials by FST/FR requirement, substrate, density, cure speed and application method while confirming the documentation required for the specific aircraft program.

Quick Reference

Honeycomb structuresFST paste / film
Thermoplastic partsFST structural adhesive
Flexible sealingAerospace silicone