I don't want to go to deep here. But I had to replace a little tiny gasket
in a pump
for my kero tank, so I can pressurize it. But finding material that would hold up in the kerosene has been a bit of a problem. I found this site that lists all kinds of chemicals and material compatibility's. On boats we are always dealing with some strange stuff, so this should be helpful.
It's set up for o-ring material. but you can use it for any combination.
eFunda: O-Ring Materials Compatibile with Chemical Kerosene