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SKU 7010334289
Legacy SKU 70006387669
UPC 00051138953485
Product Number 421

This 3M™ Lead Foil Tape 421 was developed as an electrically and thermally conductive tape. This highly conformable tape resists flame, moisture, weather, UV degradation, chemicals and radiation. Mated with an easy-release film liner, this malleable tape can be shaped into complex or detailed patterns or die-cut into specific shapes to meet assembly and manufacturing process needs.

  • Conformable tape resists flame, moisture, weather, UV degradation, and many chemicals
  • Performs over a wide variety of temperature conditions and is heat reflective
  • Heat and light reflective tape protects, insulates and enhances lighting efficiency
  • Can be die-cut into specific shapes for assembly and manufacturing processes
  • The rubber-based adhesive combined with the rugged, durable backing provides long service life
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On it's way to you March 19  


Minimum Order 2 Rolls
Order Increment 2 Rolls
  Immense Durability
  High Performance Tape
  Global Shipping
  Industry Low Price Per Roll
Product Dimensions
Imperial Metric
Width 23 in 584.2 mm
Length 36 yd 32.91 m
Shipping Dimensions
Weight 49.7576 lb
Length 30.9 in
Width 8.4 in
Height 9.2 in
Color Dark Silver


  1. What is the 3M™ Lead Foil Tape 421 used for?

    The 3M™ Lead Foil Tape 421 is primarily used to protect against radiation in applications such as x-rays, gamma rays, and electron beam shielding.

  2. Can this tape be easily removed or repositioned once applied?

    No, due to its high adhesive strength and conformability characteristics, it is not recommended for removal or repositioning after application.

  3. Is this tape safe to use with food or medical equipment?

    While there are no direct safety hazards associated with the tape itself, it is not recommended for use in applications where it may come into contact with food or medical equipment due to potential lead contamination.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Pliable and Conductive Lead Tape

This 3M™ Lead Foil Tape 421 is a pliable and conductive tape that is perfect for a variety of applications. The tape has a dark silver, 6.3 mil /0.16 mm lead foil backing that is coated with a distinct green rubber adhesive. This adhesive offers good initial grab and a long-lasting bond. The lead foil is a soft metal that offers excellent conformability, making it easy to shape to the most detailed and intricate shapes or patterns. By rubbing the tape down with a smooth-edged plastic piece or similar object, the tape can be made to better conform to the substrate. This is especially important if the tape is to be used as a "thief" in electroplating, where the edges must fully contact the metal base.

This lead foil tape is formulated to be electrically and thermally conductive and carries a strong acid and base resistance, making it ideal for electroplating, as a radiation barrier or x-ray plate masking. Due to the density, weight and malleability of the lead foil, this tape makes an excellent choice for weighting and balancing, particularly for golf clubs where weight and conformability are crucial for balance and club performance.

Application Ideas
  • Electroplating
  • Radiation barrier
  • Moisture barrier
  • Chemical milling
  • X-ray plate masking
  • Add weight and balance to equipment parts, golf clubs, tennis rackets, etc.

3M™ Lead Foil Tape 421 can be used as a mask to eliminate the chemical impacts of electroplating, anodizing or chemical milling. It is also used for x-ray masking and radiopacity for x-ray makers. This versatile and reliable tape can also be used as a moisture barrier or for thermo pane window sealing. This heat and light reflective tape resists flame, moisture, weather, UV degradation, chemicals and is thermally conductive to enhance heating and cooling efficiency of electronics, windows and other applications where heat dissipation is desirable. The density of the lead tape also allows it to be used for precise weighting that requires adhering to low energy and other surfaces.

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