Best antifreeze for cooling properties

I always found this coolant to be pretty cool stuff, water-less, high boiling point, no pressure needed etc.
I almost made the jump when I built my 393w, then I talked to a buddy who did some testing with this stuff.
It seems in the correct application it is a superior product, but I was told it has one BIG drawback.......
it's flammable !

the coolant is mostly a rust inhibitor and lubricant if you live in the south. I do not advise using Water Wetter as I have seen it gunk up some engines after time. Regular Prestone is what I've used for 30 years in these cars.