by FarrahDay » Thu Dec 06, 2007 5:16 pm
Ethylene glycol, or ordinary car antifreeze would be the best place to start as they used to use it in 'wet electrolytic capacitors' to stop them freezing up. Otherwise they could only be used indoors or at room temperatures.
Must be pretty stable, non-reactive stuff otherwise it would have created its own problems.
Farrah Day.