Originally Posted by zone 69
I don't think it's the same for silicone. But hay what do I know.
I've used it on silicone over the top of an octave vent thread on an instrument (my own) and there have been no negative affects.
As far as I know it's bad for natural old school rubber, but O-rings nowadays are all synthetic rubber, so moisture doesn't affect anything. It's also not good for certain polycarbonate and polystyrene plastics.