Expanded Polystyrene

Thermal insulation
Expanded Polystyrene (EPS) is a lightweight, rigid, plastic foam insulation material produced from solid beads of polystyrene. EPS contains no CFC’s and is considered ozone friendly by the Wildlife Society of South Africa.
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Polystyrene is made by polymerising styrene, which is produced by combining benzene and ethylene. The polystyrene thus produced is one of the thermoplastic materials sometimes called linear polymers. These are materials that soften on the application of heat and harden as they cool. The expanded foam (known EPS) is used in various built environment applications.

Sagex has more than 50 years experience in the manufacture of EPS and introduced the product into the South African market.

Key Facts

  • Resistant to vibration
  • Low mass
  • Thermally efficient
  • Recyclable
  • CFC and HCFC free, physiologically and chemically harmless
  • Resistant to aging, mildew, bacteria and rot
  • Easily cut and worked (fine toothed saw and conventional hand tools)
  • Easily bonded – ensure adhesive is compatible with EPS
  • Easily painted using high quality acrylic PVA applied by brush or spray.

Product variations

Articles information
Name SKU Length (mm) Width (mm) Thickness (mm) R-Value (m2.K/W)
NameExpanded Polystyrene 15 SKU10923 Length (mm)2440 Width (mm)1220 Thickness (mm)25 R-Value (m2.K/W)0.66
NameExpanded Polystyrene 20 SKU10930 Length (mm)2440 Width (mm)1220 Thickness (mm)25 R-Value (m2.K/W)0.71
NameExpanded Polystyrene 30 SKU10937 Length (mm)2440 Width (mm)1220 Thickness (mm)25 R-Value (m2.K/W)0.76


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Quality Management Certificate
Technical Data Sheet