Autoclaved Aerated Concrete (AAC) refers to a lighter, precast, eco-friendly concrete building substance ideal for the production of concrete masonry units such as blocks. Made up of Fly Ash, lime, gypsum, cement, aluminium powder, Sodium Dichromate, Soluble Oil and water, AAC products cure in an autoclave under heat and pressure. Our blocks are also specially designed to provide structure, insulation, as well as fire and mold resistance. Arcolite® AAC blocks are your new alternative to the out-of-date bricks that are easily breakable and not heat resistant at all.