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3M 433 High Temperature Aluminum Foil Tape [Flame Resistant / Linerless]

3M 433 High Temperature Aluminum Foil Tape [Flame Resistant / Linerless]

Product Description

3M 433 High Temperature Aluminum Foil Tape is used for heat shielding applications such as wrapping over and along thermal insulation. This dead soft aluminum foil tape is coated with a clear silicone pressure-sensitive adhesive that bonds well to a variety of surfaces and excels in high-temperature applications, where other adhesive tapes may fail. The tape is designed to excel in a variety of seaming, splicing and sealing applications where high temperatures are a concern. This tape boasts an excellent performance range from -65°F to 600°F (-54°C to 316°C) and meets flame resistance requirements of F.A.R. 25.853(a) and is a UL Recognized component (file QQQW2.MH122798).

Uses & Applications

  • High temperature heat shielding applications.
  • Splice jumbo rolls of aluminum foil.
  • Hold last lap of narrow width rolls during metal annealing process.
  • Cover heating elements or wires to distribute heat.

Features & Benefits

  • Can withstand limited exposure up to 600°F/316°C for heat shielding applications.
  • Thermally conductive tape helps dissipate heat to protect temperature sensitive materials.
  • Can be used to improve heating and cooling efficiency.
  • Dead soft aluminum foil backing conforms to curved and uneven surfaces.
  • Flame resistant – meets requirements of F.A.R. 25.853(a).
  • UL Recognized component (file QQQW2.MH122798).
Made in the U.S.


Technical Information

3M 433 High Temperature Aluminum Foil Tape
  • Standards Met: FAR 25.853(a); UL Recognized component (file QQQW2.MH122798)
  • Carrier/Backing: aluminum foil
  • Adhesive: silicone   How are adhesives different?
  • Thickness: 3.6 mils (carrier, adhesive) 2 mils (carrier)   What is mil thickness?
  • Adhesion: 40 ounces per inch (to stainless steel test panel)
  • Tensile Strength: 20 pounds per inch (longitudinal)
  • Service/Operating Temperature: -65°F to 600°F
  • Application Temperature: 32°F to 200°F
  • Elongation: 3.5%
  • Core: 3" diameter
Note: Specifications are those given by manufacturers and are not tested for accuracy.

Alert Roll Sizes/Widths

Please note that tape rolls are NOT guaranteed to be splice-free. Tape rolls are typically cut to standard tape industry metric-cut sizes - or approx 5% narrower than the nominal size (i.e. 24mm per 1-inch of nominal width ordered).

Download Datasheets

The following downloads are available for this product:

Download Technical Data Sheet

Question & Answers

User Reviews

3M 433 High Temperature Aluminum Foil Tape [Flame Resistant / Linerless]
Made in the USA
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
natural rubber
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
zinc oxide
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils
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