might be glycerin or glycerol, also doesn't change volume with temp changes .... and if ya lose yer way you can eat it for some calories getting cheap I think, as it's a byproduct of biodiesel production
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
getting cheap I think, as it's a byproduct of biodiesel production 
