QUOTE(Winry_Rockbell83 @ Oct 19 2007, 08:51 PM)
If his Blood Seal is touched, then he'll be killed, so if he lost all of his armor, Al would without a shadow of a doubt, die. The armor is the only thing keeping his soul tied down.
Actually, if I recall correctly, in one of the episodes, Lust lightly rakes her finger
on the seal, and nothing happened [sans obvious uncomfortableness].
Now of course, if the whole thing were to get scratched, gashed, or washed away, then yes, he'd die.
Anyway, I think that explains it. However, I think if all that was left was just the slab with his blood seal on it, I'd think he'd still be alive, if the seal itself was still intact. I dunno if he'd be able to talk, though.