It would be fair to say that rubber is not my field of expertise. I have recently been part of completing a project for a client that requires mineral oil and rubber. I was made aware that natural rubber, as well as many other synthetic materials were not compatible with mineral oil. Having researched it I purchased some nitrile rubber to use as a sealant, under the impression that it would not react. After a few days I noticed that the oil near the rubber was turning a yellow colour. Thinking it might have just been a chemical used to treat the rubber I drained the oil and topped it up with a fresh batch. Once again it turned yellow. Would anyone be able to shed some light as to what is causing the discolouration and if there's anything I can do to prevent it from happening any further?
TLDR: Is it normal for nitrile to leak yellow into mineral oil and can it be prevented?
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