That's not what I've read in white papers over the years. It seems that 2-EHA is far more likely to soften gasket and plastics than it's distant cousin
sebacate.
I'd like to see one actual paper that states that "2-EHA is far more likely to soften gasket and plastic than it's distant cousin sebacate". They're both plasticizers, one isn't better than the other, and gaskets are designed to deal with that. The 2-EHA is worse than sebecate logic makes about sense as saying methanol cigarettes are healthier than regular cigarettes.