Comparison
Fuel and Oil Resistant Fluorosilicone Rubber vs PEEK
A side-by-side comparison of Fluorosilicone Rubber (FVMQ) and Polyether Ether Ketone.
Physical
Density
1.15 - 1.40 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.2 - 0.5 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.0 - 3.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.001 - 0.01 GPa
3.6 GPa
Tensile Strength
5 - 10 MPa
100 MPa
Elongation at Break
100 - 400 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-70 to -40 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
-60 to 200 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
3.0 - 3.5
3.2
Volume Resistivity
10^12 - 10^14 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Good resistance to fuels, oils, and many solvents; Poor resistance to ketones and esters
Excellent
UV Resistance
Excellent
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Very Limited
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
High
~30 kg CO₂e / kg