ElastaPro makes fluorosilicone materials resist petroleum oils and hydrocarbon fluids. For full specifications and product availability, visit our Fluorosilicone pillar page.
Although fluorosilicones resist many aggressive chemicals, they do not resist all chemicals. Use the fluorosilicone chemical compatibility charts below for information about resistance to:
- Fuels
- Oils and lubricants
- Solvents
- Water and coolants
- Chemicals and industrial chemicals
- Aerospace and specialty chemicals
- Food and pharmaceutical chemicals
Each of these fluorosilicone chemical compatibility charts uses this rating system.
- Excellent (A): Fully compatible, very low swelling, maintains physical properties
- Good (B): Minor swelling or property change; generally acceptable
- Fair (C): Significant swelling or degradation; use caution
- Poor (D): Not compatible; severe degradation
- NR: Not recommended / data insufficient
Important: These are typical values. It is the responsibility of the user to ensure a fluorosilicone’s compatibility with the specific fuel, oil, solvent, or chemical in your application under the expected service conditions.
Fluorosilicone Fuel Resistance
| Fuel |
Fluorosilicone Compatibility |
Notes |
| Gasoline (unleaded) |
A |
One of the major strengths of fluorosilicone; excellent resistance. |
| Aromatic gasoline blends |
A–B |
Good resistance but swelling may increase with >30% aromatics. |
| Aviation gasoline (Avgas 100LL) |
A |
Suitable for aviation fuel systems and seals. |
| Jet fuels (JP-8, Jet A, Jet A-1) |
A |
Excellent resistance; widely used in aerospace. |
| Diesel fuel |
A |
Very good resistance; minimal volume change. |
| Biodiesel blends (B20 – B100) |
B–C |
Bio-based esters can cause swelling; test needed. |
| Ethanol (E10–E85) |
B–C |
Ethanol attacks silicone backbone; moderate swelling possible. |
| Methanol blends |
C–D |
Methanol is highly aggressive; generally not recommended. |
| Kerosene |
A |
Stable; commonly used in fuel-handling systems. |
Fluorosilicone Resistance to Oils and Lubricants
| Oil or Lubricant |
Fluorosilicone Compatibility |
Notes |
| Motor oil (mineral-based) |
A |
Very good resistance. |
| Synthetic engine oils (PAO-based) |
A |
Good overall performance. |
| Diester lubricants |
B–C |
Some swelling possible depending on polarity. |
| Polyol ester (POE) lubricants |
C |
Moderately aggressive; swelling may be excessive. |
| Hydraulic oil (petroleum-based) |
A |
Excellent compatibility. |
| Skydrol (phosphate ester hydraulic fluid) |
D |
Not compatible; causes severe degradation. |
| Silicone oils |
A |
Good compatibility due to related polymer structure. |
Fluorosilicone Solvent Resistance
| Solvent |
Fluorosilicone Compatibility |
Notes |
| Aliphatic hydrocarbons (hexane, heptane) |
A |
Excellent swelling resistance. |
| Aromatic solvents (toluene, xylene) |
B–C |
Better than standard silicone, but still moderate swelling. |
| Ketones (MEK, acetone) |
D |
Attacks polymer backbone; not compatible. |
| Alcohols (isopropyl, ethanol) |
C |
Better than silicone but still moderate swelling at high exposure. |
| Chlorinated solvents (methylene chloride) |
D |
Rapid degradation; unsuitable. |
| Ether-based solvents |
C–D |
Poor resistance. |
Fluorosilicone Resistance to Water and Coolants
| Water or Coolant |
Fluorosilicone Compatibility |
Notes |
| Fresh water |
B |
Good short-term, but fluorosilicone absorbs moisture over time. |
| Hot water / steam |
D |
Not recommended; significant degradation. |
| Glycol coolants (ethylene/propylene glycol) |
B |
Acceptable for intermittent exposure. |
| Salt water |
B |
Similar to fresh water; moderate absorption. |
| Refrigerants (R134a, R1234yf) |
B |
Generally compatible but not the best choice compared to HNBR. |
| Ammonia |
D |
Strongly incompatible. |
Fluorosilicone Resistance to Chemicals and Industrial Fluids
| Chemical or Industrial Fluid |
Fluorosilicone Compatibility |
Notes |
| Acids (dilute) |
C |
Some resistance but not strong; test needed. |
| Strong acids (HCl, sulfuric acid) |
D |
Not compatible. |
| Alkalis (sodium hydroxide) |
D |
Strong deterioration. |
| Brake fluid (glycol ether-based) |
D |
Causes rapid polymer attack. |
| Diesel exhaust fluid (DEF / urea) |
C–D |
Urea can cause softening. |
| Ozone |
A |
Excellent resistance, similar to silicone. |
| UV and weathering |
A |
Extremely resistant; suitable for outdoor use. |
Aerospace and Specialty Chemicals
| Aerospace or Specialty Chemical |
Fluorosilicone Compatibility |
Notes |
| Hydrazine |
C–D |
Very aggressive; not recommended. |
| Liquid oxygen (LOX) |
NR |
Requires LOX-tested materials; fluorosilicone not typically approved. |
| Liquid nitrogen (LN2) |
B |
Performs reasonably well but will stiffen at cryogenic temperatures. |
| Rocket propellants (RP-1) |
A |
Very good resistance; used in aerospace seals. |
Food and Pharmaceutical Chemicals
| Foor or Pharmaceutical Chemical |
Fluorosilicone Compatibility |
Notes |
| Vegetable oils |
A–B |
Good compatibility with most oils. |
| Animal fats |
B |
Acceptable for low-temperature use. |
| Cleaning agents (mild detergents) |
A–B |
Generally compatible. |
| Strong disinfectants |
C–D |
May cause surface degradation. |
Summary Table (Condensed)
| Category |
Compatibility Summary |
| Fuels |
Excellent: Ideal for gasoline, diesel, jet fuel. |
| Oils |
Excellent–Good: Strong resistance to petroleum oils. |
| Solvents |
Good–Poor: Avoid ketones, methanol, chlorinated solvents. |
| Water / Steam |
Fair–Poor: Not suitable for hot water or steam. |
| Chemicals |
Variable: Poor with acids, alkalis, brake fluid. |
| Aerospace Fluids |
Excellent (hydrocarbons); poor for hydrazine and LOX. |
| Environmental Exposure |
Excellent: UV, ozone, weathering. |
