Expandable Polystyrene (EPS)

Expanded polystyrene (EPS) is made of closed-cell polystyrene beads that are steamed to expand to the desired density during the pre-expansion and molding process.

Expanded polystyrene can be manufactured to meet specific requirements of commercial, residential, and civil engineering projects. Offering comprehensive strength from 10 to 60 PSI, EPS is produced in a wide range of densities to achieve the structural integrity and thermal performance.

EPS is non-hygroscopic and does not readily absorb moisture from the atmosphere. Its closed-cell structure reduces absorption and/or migration of moisture. Extensive testing has confirmed that even small quantities of moisture absorption have a minimal effect on the thermal performance of EPS insulation.EPS is resistant to liquid water, and it is moderately permeable to water vapor under pressure differentials. Vapor permeability is determined by both density and thickness. Generally, neither water nor water vapors affect the mechanical properties of EPS

EPS is suitable for all kinds of applications and it can be molded in a range of densities. For greater structural resistance, in-house molded plastic inserts can also be included in the molding process.

Expanded polystyrene exhibits a number of outstanding properties meeting the needs of a number of general applications including but not necessarily limited to building insulation, packaging, flotation, geotechnology, product displays, stage settings, etc.

Features & Benefits

  •  low density
  •  thermal and acoustic insulation capacity
  •  excellent mechanical properties (resistance in compression, capacity for dampening shocks)
  •  insensitivity to water
  •  ability to be molded or cut into nearly unlimited shapes
  •  ability to be recycled


  • building and construction industry
  • insulation foam for closed cavity walls, roofs, and floor insulation
  • road construction, bridges, drainage, flotation and sound insulation
  • packaging i.e. industrial/protective packaging and food packaging
  • Protective packaging applications include packaging of delicate electronic goods such as edge protectors for refrigerators, TV’s and electronics, etc.
  • used to pack perishable food items such as grapes, eggs, meat, fish, poultry, and wine
  • used in cold chain packaging requirements.