jon,
its johns nature to be very technical. ya gots to remember, he's been at the game some 40yrs or more and in that much time, you not only learn quite a bit, he has chosen to learn beyond what most in the business choose.
i think what he means is this..............
for encap to work to its potential, it must be allowed to dry 100%, if not, enough will be removed in the vac process, where its not enough to form the "shell" as he calls it.
jon,
are you maybe thinking in the lines of padcapping, like ya do with carpets?