Concrete is a building material that is unlocked by Mechanization and crafted in the workshop.
- Concrete is crafted using 25 steel and 2500 slabs. The amount generated is dependent on the craft ratio, which is based on the number of Workshops and Factories built.
- Having a Chemist as leader boosts the amount of concrete crafted slightly.
- Trading with the Nagas may yield concrete once 10 embassies are built.
- Concrete is used for most endgame buildings and many endgame workshop upgrades.