FKM Rubber vs. PTFE
FKM rubber belongs to the thermoset elastomers (rubber) classification, while PTFE belongs to the thermoplastics. There are 7 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is FKM rubber and the bottom bar is PTFE.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.8 | |
| 2.1 to 2.3 |
| Elongation at Break, % | 300 | |
| 75 to 300 |
| Limiting Oxygen Index (LOI), % | 51 | |
| 90 |
| Maximum Temperature: Mechanical, °C | 220 | |
| 260 to 270 |
| Strength to Weight: Axial, points | 1.1 | |
| 1.7 to 3.2 |
| Strength to Weight: Bending, points | 4.7 | |
| 5.7 to 8.7 |
| Tensile Strength: Ultimate (UTS), MPa | 7.5 | |
| 13 to 25 |