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Roll of dark silver lead foil tape, half-inch wide, continuous form

3M

3M 420 Lead Foil Tape 1/2 in x 5 yd

SKU CH-KF42-GBVF3

Lead foil tape for assembly and manufacturing, rubber adhesive, -60 to 225 °F range

  • ColorDark Silver
  • Withstands extreme cold down to -60 Degrees F
  • Handles high heat up to 225 Degrees F
  • Rubber adhesive bonds reliably across temperature swings
  • Lead foil backing provides radiation shielding
  • 1/2 in width suits precision masking tasks

Purpose-Built Shielding Tape

3M 420 Lead Foil Tape is a continuous roll designed for assembly and manufacturing tasks that require metal-backed shielding. It suits technicians needing a thin, conformable barrier for cable wrapping, splicing or masking in controlled environments. The rubber adhesive bonds to metal and painted surfaces indoors or outdoors.

Temperature-Rated Rubber Adhesive

The rubber adhesive maintains tack across a -60 to 225 degrees Fahrenheit range, so the tape stays secure through thermal cycling without residue transfer. Lead foil backing provides electrical conductivity and radiation attenuation that plastic tapes cannot match. The dark silver finish blends with industrial hardware.

Hand-Applied Continuous Roll

The half-inch by five-yard roll unspools straight from the box and tears cleanly by hand for quick cut-to-length work. No liner removal or heat activation is required. Users should wear gloves to limit lead exposure and avoid stretching the foil beyond its elastic limit, which can cause tearing.

Highlights

  • Withstands extreme cold down to -60 Degrees F
  • Handles high heat up to 225 Degrees F
  • Rubber adhesive bonds reliably across temperature swings
  • Lead foil backing provides radiation shielding
  • 1/2 in width suits precision masking tasks

Specifications

Brand3M
ColorDark Silver

Questions about this item

Will the rubber adhesive need replacement after long-term exposure to temperature extremes?

The rubber adhesive is rated for continuous use from -60 to 225 degrees Fahrenheit, so it should not require replacement within that range.

What is the first limitation reached when the tape is used continuously at high temperature?

The upper performance limit is 225 degrees Fahrenheit; beyond that the lead foil and rubber adhesive may degrade.

Does the lead foil backing make the tape heavier or hotter when applied all day?

The tape is a thin lead foil roll 1/2 inch wide by 5 yards long, adding minimal weight and no heat of its own during extended use.

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