Except the winter thing and distilled water in VG.. instead of sludge you get icy sludge.100% VG is very thick, and even thicker outdoors, now that winter is upon us. It may not flow very well in an RTA, and you may end up with burnt hits and wick. It works best in an RDA, but... you may be able to use it as is, or cut it with distilled water, or a percentage of PG. You'll have to experiment... or if that's not your thing, trade it off for some higher PG juice.