3M™ Corrosion Prevention Sealing Tape 9143FR - a new value proposition in aircraft sub-floor metallic support structure corrosion prevention
Reduce aluminum corrosion and help save money with a reliable, easy-to-apply and easier-to-remove sealing tape
With an estimated 24%* of total aircraft maintenance, repair and overhaul costs spent on corrosion management, it’s no surprise that virtually all operators around the globe have a team of engineers dedicated to corrosion mitigation.
By installing 3M™ Corrosion Prevention Sealing Tape 9143FR in your sub-floor systems and cargo holds, not only are you getting exceptional corrosion protection – you’re helping decrease overall repair costs at the same time.
Any aircraft maintenance professional can tell you, corrosion is one of the main concerns. Corrosion, or aluminum oxidation, occurs when the aluminum metallic support structure is exposed to condensation and various fluids, particularly around doors, galleys, lavatories, and in the cargo compartment.
The floors of aircraft entryways, galleys, lavatories and cargo compartments are vulnerable to frequent sources of moisture. Fluids from spills and leaks can migrate into the underlying floor support system, and condensation can form on sub-floor structures which can lead to corrosion. The resulting corrosion damage can weaken the entire sub-floor structure and result in costs up to $100,000 per aircraft, in addition to downtime.
Aircraft floor beams and supporting structures are repeatedly exposed to moisture, cleaning fluids and other contaminants throughout their service life. Without effective protection, repeated fluid exposure can contribute to corrosion, leading to increased maintenance requirements, reduced component life and additional aircraft downtime.
That’s where 3M comes in. The 3M™ Corrosion Prevention Sealing Tape 9143FR provides a sealing layer between aircraft floor beams and floorboards. The tape has FAA PMA approval and EASA accepted for application to aluminum floor beams and other floor support structures. Lab testing shows that it offers exceptional corrosion resistance. 9143FR helps to protect the metallic support structure from the effects of repeated exposure to fluids such as red wine, cola, and condensation. Its backing and adhesive are resistant to corrosives including salt fog and common acidic fluids.
This tape is conformable and compressible, sealing surfaces and fasteners to prevent moisture intrusion. It’s also flame-retardant (FR rated), which is a must for use in a cabin interior. The sealing tape offers light tack off the roll and adheres under pressure, allowing for repositionability and precise placement.
Common applications include:
- Aircraft Floor Beams - Provides a sealing layer between floorboards and aluminium floor beams, helping protect metallic support structures from repeated exposure to fluids.
- Aircraft Doors - Supports corrosion prevention in areas exposed to environmental conditions and repeated operational use.
- Cargo Compartments - Helps provide corrosion protection in areas where moisture and fluid exposure can increase the risk of structural corrosion.
- Galleys & Lavatories - Helps protect aircraft structures in areas where repeated exposure to fluids and cleaning agents can occur.
- Interior Structural Components - Provides corrosion resistance for aluminium support structures used in aerospace interior applications.
Key End-User Benefits
Replacement Avoidance
Replacing sub-floor structures can cost up to $100,000 per aircraft. With advanced corrosion protection, 9143FR can help extend the service life of your customers’ interior floor systems and help reduce replacement events.
Reduced Downtime
Designed with clean removal in mind, maintenance teams won’t spend extra time having to remove adhesive residue from metal beams and floor panels during repair and overhaul. Customers have reported up to 20 hours of reduced labor per aircraft.**
Airworthiness Approved
Already approved by the Federal Aviation Administration (FAA), your engineering team doesn’t have to worry about OEM approval or spend extra time and money qualifying a new product for application and use.
Key Product Features
Excellent corrosion resistance
- Withstands salt fog environment to help protect metallic support structures from corrosion
- Helps protect aluminum structures from corrosion caused by repeated exposure to fluids inside cabin environment
Easy to install and remove
- Repositionable during application and conformable
- Designed to remove cleanly for typical aircraft coatings and surfaces after service
- Easy to handle and cut with scissors and common repair tools
Flame Resistant
- Flame resistant per 14 CFR/CS 25.853 (a), Appendix F, Part I (a) (1) (ii), 12-second vertical burn
FAA PMA Approved and EASA Accepted (PMA No. PQ04414CE, Supplement No. 4)
- Provides airlines/operators the approval needed to implement without OEM approval and with minimal engineering resources
- Product provided with FAA Part Marking and Delivered with FAA Form 8130-3 tag assuring conformity
Application Guide

Brochures
Shop the 3M Beam Tape 9143ft now
Why Aerospace Professionals Choose Aerospheres
Genuine OEM products
We supply authentic products from trusted manufacturers, giving customers confidence in product quality, performance and traceability.
Technical product support
Our experienced team can help identify the right product for your application, providing guidance on specifications, suitability and compliance requirements.
Global aerospace supplier
Supporting customers across the aerospace, aviation, defence and MRO sectors with access to specialist products from leading manufacturers, helping organisations source critical materials worldwide.
Trusted by MRO, defence and aviation
Aerospheres is a trusted supply partner to maintenance providers, airlines, defence organisations and aerospace manufacturers, supporting critical operations with reliable product availability.
Worldwide shipping
Our global logistics network enables efficient delivery to customers and maintenance facilities around the world, helping keep projects and operations on schedule.
Aerospace inventory expertise
With a specialist focus on aerospace consumables and materials, we understand the unique procurement and operational requirements of the industry.
*“Review of Corrosion in Aircraft Structures”, Aerospace Research Center, National Research Council Canada: 2021 ⁑Results may vary
** Results may vary