• Description for 3M 421

    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, Mask
    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

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  • Best Practices

    *See Terms of Use Below

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Tensile Strength Test Methods
Tensile Strength Test Method
15 (lbs./in.) ASTM D-3759, width
General Bond Strength Test Methods
General Bond Strength Substrate Test Method
31 (oz./in.) Steel ASTM D-3330, width
45 (oz./in.) Steel ASTM D-3330, width
Elongation Test Methods
Elongation Test Method
14 % ASTM D-3759 (at Break)