¡Look at (and READ) the pink stuff jug!
On the advice of a friend that used to be a product engineer for a major OE chemical supplier, I have started reading the jugs of RV anti-freeze that I have. The old ones were straight Propylene ...
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"They are denatured alcohol" ... ah ... I never thought of that? Fresh water tank ... great place to stash the moonshine! (And it will sanatize at the same time, if the pipes don't melt first!)
