Comparison
Fuel and Oil Resistant Fluorosilicone Rubber vs PA66
A side-by-side comparison of Fluorosilicone Rubber (FVMQ) and Polyamide 6,6 (Nylon).
Physical
Density
1.15 - 1.40 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.2 - 0.5 %
1.2 %
Transparency
Opaque
Opaque
Shrinkage
1.0 - 3.0 %
1.5 – 2.0 %
Mechanical
Young's Modulus
0.001 - 0.01 GPa
3.0 GPa (dry)
Tensile Strength
5 - 10 MPa
80 MPa
Elongation at Break
100 - 400 %
60 %
Impact Strength (Izod)
N/A
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
-70 to -40 °C
70 °C
Melting Point
N/A
255 – 265 °C
Continuous Service Temperature
-60 to 200 °C
100 – 120 °C
Heat Deflection Temperature
N/A
75 °C (unfilled)
Electrical
Dielectric Constant
3.0 - 3.5
4.0
Volume Resistivity
10^12 - 10^14 Ohm-cm
10¹² Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Good
Poor
Bases
Good
Good
Solvents
Good resistance to fuels, oils, and many solvents; Poor resistance to ketones and esters
—
UV Resistance
Excellent
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Very Limited
Recyclable
Recycling Code
N/A
7
Carbon Footprint
High
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)