https://www.youtube.com/watch?v=PmBx5Zo8KZo After viewing this My question should make sense. I have been wondering if Air Crete is air tight?
Yes, aircrete is air tight, and impermeable to water too, although it can absorb a small bit of water. I would not try to construct an above ground tank with it unless you had reinforcing to handle the tensile forces.
This is brilliant thankyou...