In addition to the physical properties discussed in the preceding section, there are also a couple of very important chemical properties you should consider when choosing an elastomeric compound. Primarily, the material must be chemically compatible with the substance(s) to be sealed. You must also anticipate any volume changes that the compound may undergo as a result of contact with system fluids.

COMPATIBILITY
VOLUME CHANGE
CHEMICAL COMPATIBILITY GUIDE

“Because ‘likes dissolve likes,’ the true key to compatibility between the seal and the fluid(s) being sealed is dissimilar chemical structure.”