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Best antifreeze for JS3M

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It says concentrate, and when used neat it protects down to -37degsC.


Although it ways what it isn't, it doesn't say what it is and doesn't mention ethylene glycol. The reason I say this is that neat ethylene glycol freezes at -12C and has properties such that when diluted 60/40 : glycol/water it has a freezing temperature of -45C.


I reckon it's a nominal 50/50 mix.


The toxicity is what puts me off where the engine is used to heat hot water such I might consider using Propylene Glycol which is non-toxic, and depresses freezing point more than ethylene glycol.

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