While airkrete is a cementitious foam insulation. It is not hard. You can push wires, pipes, etc through if you really wanted to. I always recommend anyone looking to insulation with airkrete to have electrical, plumbing, etc done beforehand.
It will not stain walls. it does go in with a moisture content, but it is not “wet” in the way that you can ring water out of it.
It does a much better job of air sealing than cellulose and there is no dust installing airkrete. Cellulose is like being in a dust storm when installing.
It will take a bit to completely dry out, as the airkrete dissipates the moisture through vapour flow ( from warmer to colder) and through airflow in weep holes etc on brick veneer. In wood sided homes, round thimble vents should be installed to allow it to breath and dissipate. Aluminum and vinyl sided homes are no problem.
Airkrete is the only insulation that we have in Canada that can also insulate double brick/brick and block construction due to the small gap (usually 1").
Installation can also be done from outside through mortar lines in some cases, instead of from the inside.
We can also insulate homes that have R7 insulation batts in a 2x4 wall, compressing the old insulation and filling the void with airkrete. It is not a vapour barrier, but is an air barrier.
Yes, I am an installer, but the first installation I ever did was my own home. What a difference.