The pink stuff could be ethylene or propylene glycol, but it still works in
combination with hot water and a garden sprayer for deicing purposes. And
no, I don't live down south, but actually reside in Wisconsin, where ice and
flying in ice are concerns from October through May.

I actually stopped using it, since I now collect the overflow from filling
my TKS and spray it on the plane. However, the pink stuff does work, and is
a lot cheaper than car antifreeze, and doesn't contain the rust retardant,
although I don't know whether it would be a problem or not.