sorry if this have been posted before..
but it seems the yellow isoheet isn't suitable any more..so what to use??

well.. I recently stumbled into a supply of air-brake line anti-freeze..
any guess as to what this was..yep methanol...or as stated Ice road truckers..methyl hydrate..well that get some things right but not this..methyl hyrdate is a gas as normal air pressure..there using pure methanol..

just find a place that services Class 8 truck..18 wheelers..they'll have the air-brake anti freeze..I found some in a local Car Quest store in NC..so anyone north should have this.

just thought I'd pass it on.
it comes int quarts not 12oz bottles..no idea on cost

-dkenny

Its sold everywhere here in Canada as methyl hydrate also. Its used as gas line antifreeze and diesel fuel antifreeze...
Jon