Electrically conductive lead foil tape with rubber adhesive for industrial masking, radiation barriers, and electroplating applications. Conformable, flame-resistant, and temperature-rated -60°F to 225°F.
3M™ Lead Foil Tape 421 is an electrically and thermally conductive tape specifically engineered for industrial and occupational applications. This highly conformable tape features a dark gray lead foil backing coated with a distinctive green rubber adhesive that provides excellent initial grab and long-lasting bonds that remove cleanly from most surfaces. The malleable construction allows the tape to be shaped into complex or detailed patterns and can be die-cut into specific shapes to meet precise assembly and manufacturing process requirements.
The tape is formulated to resist flame, moisture, weather, UV degradation, chemicals, and radiation, making it ideal for demanding industrial environments. With a maximum operating temperature of 225°F (107°C) and minimum operating temperature of -60°F (-51°C), this tape performs reliably over a wide variety of temperature conditions. The lead foil backing can be burnished to fully cover the adhesive and allow full contact of the lead foil to the metal base, resulting in metal-to-metal contact that continues the electrical path and reduces build-up at the adhesive interface. The rubber-based adhesive combined with the rugged, durable backing provides exceptional long service life.
This product is delivered as a case containing 4 rolls, with each roll measuring 3 inches wide by 36 yards long with a total thickness of 6.3 mils. 3M Lead Foil Tape 421 carries strong acid and base resistance, making it particularly suitable for electroplating applications, radiation barriers, moisture barriers, and chemical milling operations. The heat and light reflective properties protect, insulate, and enhance lighting efficiency in specialized industrial applications.
Key Features
- Electrically and thermally conductive for metal-to-metal electrical path continuation
- Highly conformable and pliable - can be shaped into complex patterns and die-cut into specific shapes
- Resists flame, moisture, weather, UV degradation, chemicals, and radiation
- Heat and light reflective properties protect, insulate, and enhance lighting efficiency
- Rubber-based adhesive with green color provides excellent initial grab and clean removal from most surfaces
- Strong acid and base resistance suitable for electroplating applications
- Wide operating temperature range from -60°F to 225°F (-51°C to 107°C)
- Burnishable lead foil backing allows full contact with metal surfaces
- Long-lasting bond with durable backing provides extended service life
- Packaged as 4 rolls per case for convenient ordering and inventory management
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 421 |
| UPC | 00051138953140 |
| 3M ID | 7010312661 |
| Backing Material | Lead Foil |
| Backing Thickness (Imperial) | 4 mil |
| Backing Thickness (Metric) | 0.1 mm |
| Adhesive Type | Rubber |
| Adhesive Thickness (Metric) | 0.1 mm |
| Product Color | Dark Silver |
| Overall Width (Imperial) | 3 in |
| Overall Width (Metric) | 76.2 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Total Tape Thickness (Imperial) | 6.3 mil |
| Total Tape Thickness (Metric) | 0.16 mm |
| Tensile Strength (Imperial) | 15 lb/in |
| Tensile Strength (Metric) | 26.3 N/100mm |
| Elongation at Break | 14% |
| Maximum Operating Temperature (Fahrenheit) | 225°F |
| Maximum Operating Temperature (Celsius) | 107°C |
| Minimum Operating Temperature (Fahrenheit) | -60°F |
| Minimum Operating Temperature (Celsius) | -51°C |
| Shelf Life | 18 months |
| Smallest Saleable Unit | Roll |
| Units per Case | 4 rolls |
| Industries | Aerospace, Appliance, Automotive, Construction, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Recommended Applications | Masking in electroplating, Radiation barrier, Moisture barrier, Chemical milling |
| Regulatory Status | For industrial/occupational use only. Not for consumer sale or use. |
Order 3M Lead Foil Tape 421 Dark Silver 3 in x 36 yd at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
