| Product Number | 3M 5421 |
| UPC Code | 00021200268991 |
| Overall Width (Imperial) | 5 inches |
| Overall Width (Metric) | 127 mm |
| Overall Length (Imperial) | 18 yards |
| Overall Length (Metric) | 16.45 meters |
| Total Tape Thickness without Liner (Imperial) | 6.7 mil |
| Total Tape Thickness without Liner (Metric) | 0.17 mm |
| Backing (Carrier) Thickness (Imperial) | 5 mil |
| Backing (Carrier) Thickness (Metric) | 0.13 mm |
| Back Side Adhesive Thickness (Metric) | 0.13 mm |
| Overall Height (Imperial) | 6.7 mil |
| Overall Height (Metric) | 0.2 mm |
| Backing (Carrier) Material | Polyethylene (Ultra-high Molecular Weight) |
| Product Color | Transparent |
| Adhesive Type | Rubber |
| Primary Liner | 60# Densified Kraft, Silicone Treated Paper |
| Adhesion Strength (Imperial) | 26 oz/in |
| Adhesion Strength (Metric) | 28 N/100mm |
| Tensile Strength (Imperial) | 30 lb/in |
| 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 |
| Shelf Life (Months from Date of Manufacture) | 18 months |
| Product Form | Roll |
| Units per Case | 2 rolls |
| Smallest Saleable Unit | Roll |
| Application | General Industrial |
| Specifications Met | ASTM D3330, ASTM D3652, ASTM D3759 |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Electronics, General Industrial, Metalworking, Military & Government, Specialty Vehicles, Transportation |