Specification Code: BMS 5-145
Specification Type: Boeing Material Specification (BMS)
Issuing Authority: The Boeing Company
Access: Boeing proprietary; verify the current revision level through Boeing or an approved materials source
Primary Tape Category: Aluminium foil PSA tape, often informally called “speed tape”
Typical Applications: Temporary non-structural exterior protection, surface sealing, fairing protection, and panel covering where authorised by Boeing maintenance documentation
Related Specification: AMS-T-23397B; legacy references may include MIL-T-23397
What BMS 5-145 Is
BMS 5-145 is a Boeing-controlled material specification for aluminium foil pressure-sensitive adhesive tape used in certain Boeing aircraft applications. It defines the material, construction, and performance requirements that a product must meet for use where Boeing maintenance documentation calls for this specification.
BMS 5-145 is not a generic industrial tape description. It is an OEM-controlled specification, so any claimed compliance must be verified against the current Boeing document and the applicable aircraft maintenance data.
In practice, Boeing maintenance documents may reference BMS 5-145 when a specific aluminium foil tape is required for an authorised maintenance or protection task. A general-purpose foil tape should not be treated as a substitute unless engineering approval and the relevant maintenance data allow it.
Why It Matters
BMS specifications support controlled sourcing, traceability, and programme-specific approval. For Boeing-supported maintenance work, the specification code is often more important than the product name alone.
Where BMS 5-145 is cited, it should be treated as a requirement within the scope of the relevant maintenance document, not as a general recommendation. Maintenance organisations should confirm that the tape, revision level, and intended use all match the approved data.
Certificates of Conformance, batch traceability, and current revision control are important parts of compliant aerospace sourcing. These records help support maintenance documentation and quality system requirements.
Common Tape Characteristics
Products associated with BMS 5-145 are typically aluminium foil pressure-sensitive adhesive tapes with the following general characteristics:
- Dead-soft aluminium foil backing for conformability on curved surfaces.
- Pressure-sensitive adhesive designed for exterior aircraft use.
- Self-wound construction in many maintenance-use formats.
- Performance appropriate for temporary, non-structural applications.
- Fire performance that must be verified against the relevant product and aircraft requirements.
Exact thickness, adhesive type, temperature capability, peel adhesion, and other values must be verified against the current Boeing specification and the product datasheet.
Typical Applications
BMS 5-145 type tapes are commonly used in authorised Boeing maintenance contexts such as:
- Temporary protection of non-structural exterior surfaces.
- Covering minor surface damage pending approved repair.
- Fairing and access panel protection.
- Temporary sealing of seams or gaps where authorised.
- Transit or line-maintenance protection under approved procedures.
- Masking or surface protection during certain maintenance tasks, where allowed by the maintenance data.
These uses are controlled by the relevant Boeing maintenance manual, structural repair manual, or approved engineering instructions. If an application is not explicitly covered, engineering authorisation is required before use.
What It Is Not For
BMS 5-145 tape should not be presented as suitable for:
- Structural repairs.
- Permanent repairs.
- Fuel system or fuel tank repairs.
- Pressurised fuselage repairs unless specifically authorised.
- Flight control repairs without approved engineering instructions.
- Any use outside the applicable Boeing maintenance documentation.
Performance Themes
BMS 5-145 type tapes are generally selected for performance in aircraft environments that may include temperature variation, moisture, UV exposure, vibration, and contact with aviation fluids. The exact resistance levels depend on the product and revision.
Key performance themes usually include:
- Temperature resistance for cold-soak and ground-exposure conditions.
- Chemical resistance to fluids such as hydraulic fluid, de-icing fluids, and cleaning agents.
- UV and weathering resistance for exterior exposure.
- Moisture resistance to help reduce surface ingress.
- Peel adhesion and tensile strength appropriate for temporary exterior use.
- Fire performance verified to the applicable aircraft requirements.
All numeric performance data should come from the current manufacturer datasheet and the relevant Boeing specification.
Related Product Families
The following product families are commonly discussed in connection with aluminium foil aircraft tape applications, but each product’s approval status must be verified individually:
- 3M foil tapes, including 425 and related variants.
- Polyken/Berry Global foil tapes, including 345SW.
- IPG aluminium foil tapes.
- Nitto foil tapes.
- Scapa foil tapes.
Listing a product here does not mean it is approved for every Boeing programme or every BMS revision. Qualification must always be checked against current documentation.
How SpeedTapes Organises This
SpeedTapes is structured to help users search by specification code, manufacturer, material type, and application. That approach is useful because aerospace sourcing is often specification-led rather than product-name-led.
For a page like BMS 5-145, the most useful structure is:
- specification overview,
- common material characteristics,
- controlled use cases,
- related product families,
- related standards,
- and verification reminders.
SpeedTapes does not supply tape. It helps connect the specification to the material and the material to the relevant manufacturer or distributor.
BMS 5-145 is a Boeing-controlled specification for aluminium foil PSA tape used in certain authorised aircraft maintenance applications. Any use should be verified against current Boeing documentation, the applicable aircraft programme, and the exact product revision.