Skip to Primary Navigation Skip to Site Navigation Skip to Main Content All Site Map

3M™ Glass Cloth Tape 398FR White, 3/4 in x 36 yd, 48 per case Bulk

3M ID  70006351509    UPC#  00021200966699    3M Product Number  398FR     
3M(TM) Glass Cloth Tape 398FR White, 2 inch
3M(TM) Glass Cloth Tape 398FR White, 2 inch
3M™ Glass Cloth Tape 398FR is a flame retardant solution for many aerospace and MRO applications. It features a pressure sensitive acrylic adhesive that bonds on contact to a variety of substrates. This high adhesion bond will remain secure for extended periods of time while resisting wear and spills.
  • Abrasion resistance and good temperature resistance helps reduce failure due to wear
  • Acrylic adhesive has excellent long-aging properties ideal for many permanent applications
  • High conformability allows tape to bond over a variety of difficult textures and uneven or curved surfaces
  • Meets flame retardancy requirements of F.A.R. Part 25.853(a) and F.A.R. Part 25.855(d)
Need Help?

Questions? We can help

Contact Us



Flame Retardant Solution
Our 3M™Glass Cloth Tape 398FR is a white, glass cloth film tape with an acrylic adhesive that provides superior product performance and flame retardant properties. It features a 5.0 mil backing and a blue polyethylene film liner for ease of application. This tape is durable and has a high temperature resistance (up to 250°F/121°C). It also features good puncture resistance, high tensile strength and superior abrasion resistance. The white color ensures a clean and appealing finished product. Combined, these qualities make it is an ideal choice for use in many aerospace applications, including aircraft repair.

Recommended Applications

  • Sealing thermal and acoustic insulation panels where high adhesion and flame retardancy are needed
  • Aircraft window sealing, duct sealing and seat repair
  • Protection of wire harnesses, electrical cables or hoses from high temperature extremes and abrasion
  • Various marine applications
  • General industrial and MRO applications

Superior Adhesion with Acrylic
This tape features an acrylic adhesive that adheres immediately on contact to a variety of substrates. Once bonded this adhesive will provide high, secure adhesion for extended periods. This adhesive maintains adhesion in climate and temperature change variations.

Meeting Industry Demands
3M™ Glass Cloth Tape 398FR meets flame retardancy requirements of F.A.R. Part 25.853(a) and F.A.R. Part 25.855 (d); Boeing material specification BMS 5-146 Type I, Class I, Grade A; and Airbus Specification ABS 5649. It is EU compliant per directive 2003/11 EC of the European Parliament and the Council of February 6, 2003, amending Council Directive 76/769/EEC which restricts the use of penta-BDE and octa-BDE flame retardants.


 Adhesion Strength‎‎ 38 oz/in
 Adhesion Strength (metric)‎‎ 42 N/100mm
 Adhesive Type‎‎ Acrylic
 Applications‎‎ Splicing Flame-Retardant Tape
 Backing Material‎‎ Glass cloth
 Backing Thickness‎‎ 5 mil
 Backing Thickness (metric)‎‎ 0.13 mm
 Back-Side Adhesive Thickness (metric)‎‎ 0.13 mm
 Brand‎‎ 3M
 Color‎‎ White
 Consumer Label‎‎ No
 Elongation‎‎ 7 Percent
 Industries‎‎ Transportation,‎ Specialty Vehicle,‎ Construction,‎ Automotive,‎ Military & Government,‎ General Industrial,‎ Aerospace
 Length‎‎ 36 Linear Yard
 Length (Metric)‎‎ 32.91 m
 Maximum Operating Temperature (Celsius)‎‎ 121 Degree Celsius
 Maximum Operating Temperature (Fahrenheit)‎‎ 250 Degree Fahrenheit
 Minimum Operating Temperature (Fahrenheit)‎‎ -20 Degree Fahrenheit
 Primary Liner‎‎ Polyethylene Film
 Product Form‎‎ Roll
 Shelf Life in Months (from date of manufacture)‎‎ 24
 Tape Thickness‎‎ 7 Milli-inch (mil)
 Tensile Strength‎‎ 130 lb/in
 Tensile Strength (metric)‎‎ 2276 N/100mm
 Thickness‎‎ 7 mil
 Thickness (Metric)‎‎ 0.18 mm
 Width‎‎ 0.75 Inch
 Width (Metric)‎‎ 19.05 mm