Premium aerospace-grade glass cloth tape with acrylic adhesive, flame retardant properties, and high temperature resistance from -20°F to 250°F for permanent sealing applications.
The 3M™ Glass Cloth Tape 398FRP is a premium aerospace-grade adhesive tape designed specifically for sealing aircraft cargo bay panels and thermal/acoustic insulation applications. This high-performance tape features a durable glass cloth backing that provides exceptional abrasion and puncture resistance, making it ideal for demanding aerospace environments. The tape is engineered with a pressure-sensitive acrylic adhesive that delivers excellent long-aging properties and maintains superior adhesion across a wide range of temperatures from -20°F (-29°C) to 250°F (121°C). Each roll measures 2 inches wide by 36 yards long with a 7 mil total thickness, and comes in cases of 24 rolls for bulk industrial applications.
This tape meets stringent flame retardant specifications including F.A.R. Part 25.853(a), F.A.R. Part 25.855(d), and MIL A-3316C standards, ensuring compliance with aviation safety requirements. The product is EU compliant per directive 2003/11/EC and qualifies to Boeing material specifications BMS 5-146 Type I, Class I, Grade A. The glass cloth backing provides high conformability, allowing the tape to bond effectively over difficult textures, uneven surfaces, and curved applications. The acrylic adhesive formulation does not contain antimony, making it suitable for sensitive aerospace environments.
Mounted on a blue polyethylene skip-slit liner for easy application, this tape offers high tensile strength of 2080 oz/in and superior abrasion resistance for extended performance. The product is specifically formulated for industrial and occupational use in aerospace, automotive, construction, military, and transportation sectors. With a 24-month shelf life and proven performance in demanding conditions, the 3M Glass Cloth Tape 398FRP is the preferred choice for applications requiring permanent sealing with high adhesion and flame retardancy.
Key Features
- Durable glass cloth backing provides exceptional abrasion and puncture resistance for aerospace applications
- Pressure-sensitive acrylic adhesive with excellent long-aging properties for permanent bonding
- Flame retardant certification meeting F.A.R. 25.853(a), F.A.R. 25.855(d), and MIL A-3316C standards
- Wide temperature operating range from -20°F (-29°C) to 250°F (121°C) for demanding environments
- High conformability for bonding over difficult textures, uneven surfaces, and curved applications
- Antimony-free formulation suitable for sensitive aerospace environments
- High tensile strength of 2080 oz/in with superior abrasion resistance
- Blue polyethylene skip-slit liner for easy application and handling
- Boeing material specification qualified to BMS 5-146 Type I, Class I, Grade A
- EU compliant per directive 2003/11/EC for international aerospace standards
Technical Specifications
| Specification |
Value |
| Product Number | 398FRP |
| Brand | 3M™ |
| Backing Material | Glass Cloth |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Product Color | White |
| Overall Width | 2 inches (5.1 cm) |
| Overall Length | 36 yards (32.9 meters) |
| Total Tape Thickness | 7 mil (0.18 mm) |
| Backing Thickness | 5 mil (0.13 mm) |
| Adhesive Thickness | 2 mil (0.05 mm) |
| Tensile Strength | 2080 oz/in (227.7 N/100mm) |
| Elongation at Break | 7% |
| Minimum Operating Temperature | -20°F (-29°C) |
| Maximum Operating Temperature | 250°F (121°C) |
| Core Size | 3 inches (7.62 cm) |
| Case Quantity | 24 rolls per case |
| Smallest Saleable Unit | Roll |
| Shelf Life | 24 months |
| Specifications Met | ASTM D3330, D3652, D3758, F.A.R. 25.853(a), F.A.R. 25.855(d), MIL A-3316C, Boeing BMS 5-146 Type I Class I Grade A |
| Flame Retardant Rating | F.A.R. Part 25.853(a), F.A.R. Part 25.855(d) |
| EU Compliance | Directive 2003/11/EC (Antimony-free) |
| Liner Type | Blue polyethylene skip-slit |
| Indoor/Outdoor | Indoor/Outdoor |
| Recommended Applications | Sealing thermal and acoustic insulation panels, aircraft cargo bay panels |
| Industries | Aerospace, Automotive, Construction, General Industrial, Military & Government, Specialty Vehicles, Transportation |
| UPC Code | 00021200966767 |
| 3M ID | 7000124105 |
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