3M 398FR Flame Retardant Glass Cloth Tape | Boeing BMS 5-146
3M 398FR Glass Cloth Tape is a high-performance, flame-retardant aerospace solution engineered for critical cargo bay sealing, insulation bundling, and high-abrasion applications. This 7-mil tape is qualified to Boeing BMS 5-146 and FAR 25.853, providing the exceptional dimensional stability and tensile strength required for commercial aircraft production and MRO operations.
Technical Compliance & Key Features
- Aviation Fire Safety: Meets FAR 25.853(a) and FAR 25.855(d) flame performance requirements.
- OEM Specification: Qualified to Boeing BMS 5-146 Type I, Class 1, Grade A.
- Extreme Durability: Woven glass cloth backing provides superior resistance to tearing and puncture in high-abrasion environments.
- Advanced Adhesion: High-adhesion acrylic adhesive bonds securely to metals, structural surfaces, and insulation facers.
- Thermal Range: Engineered for reliable service in temperatures ranging from -20°F to 250°F (-29°C to 121°C).
3M 398FR Performance Data
| Total Thickness | 7 mil (0.18 mm) |
| Backing Material | Glass Cloth |
| Tensile Strength | 130 lb/in (228 N/cm) |
| Peel Adhesion (Steel) | 38 oz/in (4.2 N/cm) |
| Dielectric Strength | 3.8 kV |
| Shelf Life | 24 months |
Frequently Asked Questions
What aerospace applications require 3M 398FR?
It is specifically designed for aircraft cargo bay panel sealing, thermal and acoustic insulation installation, window duct sealing, and wire harness protection in aerospace interiors.
Is 3M 398FR qualified for Boeing aircraft?
Yes, 3M 398FR is engineered to meet Boeing BMS 5-146 qualification standards, ensuring compliance for aircraft production and maintenance.
Can this tape withstand aircraft vibrations?
Absolutely. The high-adhesion acrylic adhesive system is formulated to maintain a permanent seal and secure hold despite constant vibration and temperature fluctuations.
Application & Handling Guidance
For optimal bonding, apply to surfaces that are clean, dry, and free of contaminants. Remove the protective liner and apply firm pressure to ensure maximum adhesive wet-out. 3M 398FR is available in multiple widths to support specific OEM layouts and MRO sealing requirements.
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