Re: hard rubber
I have to put control arm bushing seals for my old Mercury cars on by soaking them in solvent overnight. The are way too small to fit until setting in solvent for about 12-hours. They swell up quite a bit from the solvent but after they have been installed, they will take a set to the new size without problems as long as I keep them greased. The eventually will go back to their original set but as long as they don't split & fall off, I'm a happy camper.
I does take a while for certain chemicals to permeate the rubber. Don't you just love that foreign made stuff. Harbor freight stores always smell like rubber when you go in there.
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