
Autoclaved Aerated Concrete / ALC
A lightweight aerated concrete panel filled with tiny pores. It looks softer and more porous than dense concrete, with panel joints, cut edges, and a pale mineral surface.
Common names
- AAC
- aerated concrete
- hebel panel
- lightweight concrete panel
Search phrases
- lightweight concrete panel
- industrial exterior panel
- aerated concrete wall
- gray panel wall
Common uses
- Exterior wall panels
- Partitions
- Fire-rated walls
- Warehouses
- Industrial buildings
Choosing points
- Best for apartments, factories, and large walls where lightweight concrete panels are useful.
- Panel joints and sealant lines are visually important.
- The surface is porous and often coated or painted.
- Damage at corners can reveal a lightweight cellular core.
How it ages
- Needs coating and joint maintenance; water entering cracks or joints can cause staining and deterioration.
What to avoid
- Do not leave ALC panels exposed to water at edges or penetrations; coating, flashing, and joint sealing are essential.


