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3M™ Lead Foil Tape 420

3M Product Number  420     
Scotch(r) Masking Tape 420
Scotch(r) Masking Tape 420
3M™ Lead Foil Tape 420 Dark Silver, lead foil backing with a green rubber adhesive and a clear, easy-release film liner.
  • Dark silver, lead foil 4.7 mil backing, rubber adhesive, linered, temperature range -60F to 225 degrees F
  • Good conformability, electrically and thermally conductive, strong acid and base resistance, electroplating, radiation barrier, x-ray plate masking, weighting and balancing, die-cuttable
  • Resists flame, resists moisture, resists weather, resists UV degradation, chemical resistant tape, thermally conductive tape for heating and cooling efficiency, heat reflective tape, light reflective tape, conformable tape
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3M™ Lead Foil Tape 420, linered tape used as a maskant in electroplating and as a moisture and radiation barrier in certain applications. Lead foil backing provides good conformability having electrically and thermally conductive properties. This linered tape can be easily die-cut into special sizes or shapes.


Adhesion to Steel oz/in (N/100 mm)45 (49)
Adhesive TypeRubber
Backing MaterialLead foil
Backing Thickness4.7 mil
Backing Thickness (metric)0.12 mm
ColorDark Silver
Elongation12 Percent
IndustriesTransportation, Specialty Vehicle, Metalworking, Construction, Automotive, Military & Government, General Industrial, Appliance, Electronics, Aerospace
Length35.98 Linear Yard, 36.08 Linear Yard, 36 Linear Yard, 35.97 Linear Yard
Length (Metric)32.9 m, 33 m, 32.91 m
Liner TypeEasy Release Film
Operating Temperature Range (Celsius)-51 to 107 Degree Celsius
Operating Temperature Range (Fahrenheit)-60 to 225 Degree Fahrenheit
Product FormRoll
Shelf Life18 Months
Tensile Strength lb/in (N/100 mm)20 (350)
Total Thickness6.8 mil
Width6.62 Inch, 0.75 Inch, 5 Inch, 6 Inch, 2.87 Inch, 2.5 Inch, 5.25 Inch, 3.75 Inch, 0.62 Inch, 3.93 Inch, 4 Inch, 5.5 Inch, 12 Inch, 0.37 Inch, 1.25 Inch, 0.74 Inch, 18.97 Inch, 0.35 Inch, 19 Inch, 1 Inch, 23 Inch, 0.5 Inch, 3 Inch, 15 Inch, 0.25 Inch, 1.5 Inch, 16 Inch, 18 Inch, 2 Inch
Width (Metric)76.2 mm, 95.25 mm, 73.02 mm, 19.05 mm, 100 mm, 168.27 mm, 304.8 mm, 457.2 mm, 25.4 mm, 38.1 mm, 63.5 mm, 19 mm, 6.35 mm, 482.6 mm, 31.75 mm, 12.7 mm, 406.4 mm, 152.4 mm, 9 mm, 127 mm, 482 mm, 50.8 mm, 139.7 mm, 381 mm, 101.6 mm, 133.35 mm, 15.8 mm, 584.2 mm, 9.52 mm