• Description for 3M 420

    Backed with a rubber adhesive, offering excellent conformability in a variety of application conditions, indoors and out.

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Tape
    Substrate Steel
    Industry Electroplating
    Manufacturer 3M
    Chemistry Rubber
    Cure Method Pressure Sensitive
    Color Dark silver
    High Temperature Resistance (°C) 107
    Low Temperature Resistance (°C) -51
  • Technical Data for 3M 420

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Tape
    • Substrate
    • Industry
      • Sporting Equipment - Add weight (balance) to equipment parts (golf clubs, tennis rackets, etc.)
      • Electronics - Electroplating
      • Industrial
      • Medical - X-ray plate masking
      • Other - excellent conformability in a variety of indoors and outdoor applications conditions, Radiation barrier, Moisture barrier, Chemical milling, Maskant during paint stripping
    • Chemistry
      • Other - Rubber
    • Cure Method
      • Pressure Sensitive (min) - Pressure Sensitive
    • Color
      • Gray - Dark silver
    Specifications
    Cure Specs
    Application Temperature (°F) >32
    Bond Strength
    General Bond Strength (psi) 45 (oz./in.) Test Method
    Tensile Strength (psi) 20 (lbs./in.) Test Method
    Material Resistance
    High Temperature Resistance (°C) 107
    Low Temperature Resistance (°C) -51
    Conductivity
    Electrical Conductivity (mhos/cm) Electrically conductive
    Thermal Conductivity (W/m°K) Thermally conductive
    Hardness
    Elongation (%) 12 Test Method
    Business Information
    Shelf Life Details To obtain best performance, use this product within 18 months from date of manufacture.; Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton.
    Shelf Life Temperature (°F) 60 to 80
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 18
  • Best Practices for 3M 420

    *See Terms of Use Below

    1. Surface Preparation

      Best results are obtained when applied to a clean dry surface above 32°F (0°C). Also, by “feathering” the edges – 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.

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General Bond Strength Test Methods
General Bond Strength Substrate Test Method
45 (oz./in.) Steel ASTM D-3330, width
Tensile Strength Test Methods
Tensile Strength Test Method
20 (lbs./in.) ASTM D-3759, width
Elongation Test Methods
Elongation Test Method
12 % D-3759 (at Break)
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