Here's a quick digest of some information I found with a quick search on Google.
Code:
Santoprene
http://www.tamparubber.com/gasksant.htm
Acetone ------------------- minor effect
water ----------------------- little or no effect
Ethanol -------------------- minor effect
Methanol------------------ little or no effect
Isopropal alcohol------- Not specified specifically but minor effect for alcohols
gasoline ------------------ severe effect not recommended
toluene ------------------- severe effect not recommended
xylene--------------------- severe effect not recommended
http://www.colonialengineering.com/d...t/16CHEMIC.PDF
methanol ethanol acetone isopropal alcohol
teflon not specified recommended up to 350 deg F recommended
epdm recommended recommended up to 70 deg F recommended
viton not specified not rec not rec recommended
buna not rec recommended not rec lacks recommended
santoprene not specified not specified not specified lacks recommended
http://www.sentranllc.com/pdfs/tb_chem.pdf
methanol ethanol acetone isopropal alcohol
teflon A -- A --
nylon A A A A
epdm 000000000000000000000000 not specified 000000000000000000000000000
viton C A D A
buna 000000000000000000000000 not specified 000000000000000000000000000
santoprene -- -- -- --
neoprene A A C B
silicone -- B B C
A - Recommended, excellent resistance
B - Satisfactory, minor effect good resistance
C - Limied use, moderate effect fair resistance
D - Not recommended severe effects imminent
Larry