MakeItFrom.com
Menu (ESC)

PTFE vs. FKM Rubber

PTFE belongs to the thermoplastics classification, while FKM rubber belongs to the thermoset elastomers (rubber). 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 PTFE and the bottom bar is FKM rubber.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.1 to 2.3
1.8
Elongation at Break, % 75 to 300
300
Limiting Oxygen Index (LOI), % 90
51
Maximum Temperature: Mechanical, °C 260 to 270
220
Strength to Weight: Axial, points 1.7 to 3.2
1.1
Strength to Weight: Bending, points 5.7 to 8.7
4.7
Tensile Strength: Ultimate (UTS), MPa 13 to 25
7.5