Originally posted by jlaine The electrolytic solution is a GEL, hence the term gel-plug. Go disconnect a 1 farad cap and connect it backward, you'll find that GEL flying out at you at rapid speeds. Without it you'd be picking pieces of shrapnel out of your side when the capacitor decided to erupt. They vary in consistency to almost liquid form, but being classified as a gel, it is still cosidered a LIQUID. I had one explode inside a 300/300 AC Tig machine last week. There was GEL all over the internal case where the capacitor ruptured and failed.
Therefore, you are incorrect. There is indeed a liquid inside the unit.