Fluorosilicone rubber means γ-trifluoropropylmethylpolysiloxane. Fluorosilicone rubber has excellent chemical resistance, solvent resistance and lubricating oil resistance. This silicone rubber has a small expansion rate in non-polar solvents, good cold resistance and thermal stability, and good fire resistance. , Rockets, missiles, spaceflight, petrochemicals used as hoses, gaskets, seals, fuel tanks, etc. in contact with fuel oil and lubricants. .