“What is Air-crete? Air-crete is a lightweight cementitious material that contains stable air cells uniformly distributed throughout the mixture. It is a concrete which utilizes a stable air cell rather than traditional aggregate. It is also called cellular concrete, foam concrete, light weight concrete, aerated concrete etc. Typical concrete has a density of 140 lb/cu.ft. Air-crete densities range down to 20 lb./cu. ft.