Wikia

Plastoid was the material used in the armor of clone troopers, and later in the Imperial Stormtrooper Corps. Some of the structures in Mos Eisley on Tatooine were made from this material.

It was also used to produce sturdy chairs and non-lethal slug rounds. One place where such chairs were found was on the Galactic Alliance ship Admiral Ackbar. Plastoid rounds were known to be used by Republic Commandos for crowd control and situations where death was not preferable.