Expanded Polystyrene Insulation, more commonly referred to as EPS.
EPS begins as tiny beads of polystyrene. The beads are sent into a mold and expanded many times their original size using steam and pentane until they completely fill the space.
Expanded polystyrene is very versatile because it can be molded and cut into different shapes. It is the more ideal option for construction projects that call for durability and resistance against harsh external conditions.