3M Lead Foil Tape 421

Overview

• Application Type

  • Adhesive - Bond
  • Masking

• Material Form

  • Tape

• Substrate

  • Steel

• 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 application 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)	31 (oz./in.), 45 (oz./in.)	Test Method
Peel Strength (piw)	4.9 (N/cm)	Test Method
Tensile Strength (psi)	26.3 (N/cm)	Test Method

Tape Properties

Total Thickness (mm)	0.170
Single Sided	Single Sided

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, Good thermal properties

Hardness

Elongation (%)	14	Test Method
Flexibility	Very good conformability, Excellent conformability

Business Information

Shelf Life Details	Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in the original carton. To obtain best performance, use this product within 18 months from date of manufacture.
Shelf Life Temperature (°F)	60 to 80
Shelf Life Type	From date of manufacture
Shelf Life (mon)	18