| Product Number | 3M 5421 |
| UPC Code | 00021200119873 |
| Backing Material | Ultra-high Molecular Weight Polyethylene (UHMW-PE) |
| Adhesive Type | Rubber |
| Product Color | Transparent |
| Overall Width (Imperial) | 0.8 inches |
| Overall Width (Metric) | 19 mm |
| Overall Length (Imperial) | 18 yards |
| Overall Length (Metric) | 16.5 meters |
| Total Tape Thickness without Liner (Imperial) | 6.7 mils |
| Total Tape Thickness without Liner (Metric) | 0.17 mm |
| Backing Thickness (Imperial) | 5 mils |
| Backing Thickness (Metric) | 0.13 mm |
| Back Side Adhesive Thickness (Imperial) | 1.7 mils |
| Back Side Adhesive Thickness (Metric) | 0.04 mm |
| Adhesion Strength (Imperial) | 26 oz/inch |
| Adhesion Strength (Metric) | 28 N/100mm |
| Tensile Strength (Imperial) | 30 lbs/inch |
| Tensile Strength (Metric) | 796 N/100mm |
| Elongation at Break | 440% |
| Maximum Operating Temperature (Fahrenheit) | 225°F |
| Maximum Operating Temperature (Celsius) | 107°C |
| Minimum Operating Temperature (Fahrenheit) | -30°F |
| Minimum Operating Temperature (Celsius) | -34°C |
| Primary Liner | 60# Densified Kraft, Silicone Treated Paper |
| Shelf Life | 18 months from date of manufacture |
| Product Form | Roll |
| Smallest Saleable Unit | Roll |
| Units per Case | 12 rolls |
| Application Type | General Industrial |
| Industries | Aerospace, Appliance, Automotive, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |
| Specifications Met | ASTM D3330, ASTM D3652, ASTM D3759 |
| Brand | 3M™ |