Board Thread:Wiki Discussions/@comment-3422208-20140710042534/@comment-17623-20140710104510

But that is more of the problem HELL-SKULL. Unless it is specifically stated to be something, we can't say for certainty it is.

Using Lava Release, we were told first that Lava Release did...you know...lava things. Ok great. Fantastic, then Mei used Lava Release and it was all gooey and not like molten rock. Ok fine, it was called Lava Release so yay. Then out the cut, Kurostuchi from Iwa threw Lava Release Quicklime into the mix. Okay that is weird and it acts nothing like either the Four-Tails' lava or Mei but cool, also called Lava Release. Then a Kumo-nin made rubber; again called Lava.

What all these have in common was; they were explicitly called "Lava". Had they not started off with "Lava Release" they would be nothing at all. So to assume because chakra boiling, which I've already established can and has boiled out into steam with similar effects, is also Boil Release is to speculative to make.