Comparison
Chemical-Resistant Fluoroelastomer (Viton) vs PA66
A side-by-side comparison of Fluoroelastomer (FKM - Viton family) and Polyamide 6,6 (Nylon).
Physical
Density
1.7 - 1.9 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.1 - 0.3 %
1.2 %
Transparency
Opaque
Opaque
Shrinkage
1.0 - 2.0 %
1.5 – 2.0 %
Mechanical
Young's Modulus
0.02 - 0.06 GPa
3.0 GPa (dry)
Tensile Strength
10 - 25 MPa
80 MPa
Elongation at Break
100 - 300 %
60 %
Impact Strength (Izod)
N/A
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
-10 to 0 °C
70 °C
Melting Point
N/A
255 – 265 °C
Continuous Service Temperature
-20 to 250 °C
100 – 120 °C
Heat Deflection Temperature
N/A
75 °C (unfilled)
Electrical
Dielectric Constant
4.0 - 5.0
4.0
Volume Resistivity
10^11 - 10^13 Ohm-cm
10¹² Ω·cm
Dielectric Strength
10 - 20 kV/mm
—
Chemical resistance
Acids
Excellent
Poor
Bases
Excellent
Good
Solvents
Excellent resistance to fuels, oils, many solvents, and chemicals
—
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)