Board Thread:Theories and Speculation/@comment-5407586-20150624095943/@comment-734582-20150627114652

Seelentau wrote: Sasuke says Deidara uses the Earth sign everytime he uses a technique, so your point is moot. Yet DrKret just pointed out he uses Katsu, not the "hand fold". Given that it's clay and a ranged attack, i agree with the idea that he uses the sign to detonate the clay. Besides, isn't Katsu the same sign people use to detonate Explosive tags? IMHO Deidera's jutsu is more akin to Explosive Tags, in creation and execution, than the Explosive release we see later.

It's not a pseudo-kekkei tota as it's not truly a mixture of elements, but rather using one element (earth/clay) to contain another (explosion). Konan could use Explosive tags for her paper jutsu. Perhaps the Doton sign simply breaks the containment and release the chakra?