Ok. Thank you for the answers.

Hello. I'm just about to move my radiator outside the house. Since I live in finland the coolant needs to have antifreeze in it. I have been thinking about using methanol since it easily gets the freezing point below -30C. If Glycol is used the solution needs to be about 50:50 to be sure that the whole thing won't freeze solid when pump is turned off. Glycol solution has a very low viscosity and bad thermal conductivity when used in high concentrations. My actual question is are all the material...