2-eha will interact and degrade both synthetic rubbers and hard plastics. Almost all seals produced in the last 50 years that are "rubber" are of a synthetic and not natural origin.
Originally Posted By: Donald
I would assume the seal was rubber not plastic. 2-EHA effects plastic and not rubber.
Originally Posted By: ltslimjim
For the layman: I just wish I knew if 2-eha was causing my water pump gasket to leak prematurely? I'm ignorant though. It is a 1992 vehicle that took 'conventional green' back then.