3M 398FR (4-Inch-Roll)

3M 398FR (Also known as: 3M Flame Retardant Glass Cloth Tape 398FR) is a high-performance, flame-retardant glass cloth tape designed for the demanding requirements of the aviation industry. Supplied in a 4-inch (101.6mm) wide roll, this tape is ideal for insulation, wire harness protection, and sealing applications across commercial and military aircraft. Aviation and aircraft engineers rely on 3M 398FR for its exceptional thermal resistance, durability, and compliance with stringent MRO and AOG standards, making it a trusted consumable for ground crew and maintenance teams.

Additional Product Information

Every MRO and aircraft engineer knows that safety and reliability are non-negotiable, which is why 3M 398FR is a go-to solution in both commercial and military aviation. This flame-retardant glass cloth tape delivers outstanding thermal resistance and durability, protecting wiring, panels, and insulation even in the most extreme operating environments. From advanced fighter jets to passenger airliners, ground crews depend on 3M 398FR to maintain aircraft safety and minimize AOG downtime. Stocking this tape ensures MRO teams can respond immediately to critical maintenance needs, keeping aircraft flying safely and efficiently.

Key Technical Specs

• Type: Flame-retardant glass cloth tape with pressure-sensitive adhesive.
• Width: 4 inches (101.6mm) roll.
• Thickness: Approximately 0.25 mm (0.010 in).
• Temperature Range: Continuous use up to 200°C (392°F), intermittent exposure up to 260°C (500°F).
• Primary Use: Insulating and bundling electrical wiring, protecting panels, and shielding avionics and components from heat and abrasion.
• Mechanical Properties: Strong abrasion resistance, excellent dimensional stability under thermal stress, and resistance to mechanical wear in high-vibration environments.

Approvals & Specifications

• Meets FAA, UL, and MIL-T-15502 flame-retardant standards.
• Recognized for use on Boeing, Airbus, Lockheed Martin, and military aircraft platforms.
• Referenced in aircraft electrical and insulation specification documents.

Typical Aircraft MRO / AOG Applications

• Bundling and insulating wiring looms during scheduled maintenance.
• Emergency electrical repairs during AOG situations.
• Rapid restoration of electrical integrity to minimize aircraft downtime.
• Maintaining safety compliance while reducing out-of-service time.

Compatibility & Safety Notes

• Compatible with most aviation-grade wires, cables, and harnesses.
• Flame-retardant design minimizes fire risk in aircraft electrical systems.
• Safe for use around sensitive avionics, electronics, and composite materials when applied correctly.
• Non-toxic during normal handling; standard PPE is recommended for cutting and application.

Packaging & Procurement

• Supplied as a 4-inch (101.6mm) wide roll.
• Typical roll length of approximately 36 m (118 ft).
• Sold individually or in multi-roll packs.
• Easy to store and deploy in hangars, MRO facilities, and AOG kits.

Why 3M 398FR is Chosen for AOG / MRO

• Rapid application for emergency electrical and thermal repairs.
• Maintains performance under high temperatures and vibration.
• Reduces downtime and improves safety compliance.
• Trusted by MRO teams and ground crews worldwide.

Practical Suggestions (AOG Mindset)

• Keep dedicated stock in AOG kits for emergency electrical repairs.
• Train ground crew on correct wrapping and insulation techniques.
• Use pre-cut tape sections during time-critical AOG events.
• Inspect tape periodically for adhesive degradation during long-term storage.

Manufacture / Aviation Spec Codes

• 3M Internal Code: 398FR
• Compliance: FAA / UL / MIL-T-15502
• Boeing: BMS 5-195, BMS 5-214
• Airbus: ABD0031
• Lockheed Martin: Engineering standard for wire harness insulation

Alternative Names & Descriptions

• 3M Flame-Retardant Glass Cloth Tape 398FR
• 3M 398FR Aircraft Insulation Tape
• 3M 398FR Electrical Harness Tape
• Flame-retardant aircraft electrical tape 3M 398FR
• SCOTCH398FR-101MM:D2607
• 3M-398FR-4
• 3M398FR-4INCH
• 3M398FR4P0UCES
• 398FR 4"
• 3M-398FR-4"