everything leaks. expensive liquid and leaking does'nt go well
flourinert (FC77 being the best for our purposes)
http://solutions.3m.com/wps/portal/!...i_IcFQEAOIxDW4!
Its water with flourine instead of hydrogen. Highly inert and looks and feels like water. could probably drink it and take a bath in it with some high voltage cabling.