Expanded polystyrene (EPS) is a lightweight, closed-cell foam that can be cut or moulded for different applications. Its properties depend on the material grade and density.
Applications
EPS is used in packaging, insulation and architectural decoration. Each application requires a suitable grade and installation system. General foam properties are not test results for every finished product.
EPS and fire
EPS is available with and without flame-retardant additives. Both remain combustible. Flame-retardant additives do not make EPS non-combustible; check the test evidence for the actual product and installed system.
Density
Density is mass divided by volume (ρ = m/V). It is one factor in material selection and should be considered alongside the other technical specifications.
For unit conversion, 1 pound per cubic foot (lb/ft³) is approximately 16 kilograms per cubic metre (kg/m³). This is an example, not the specified density of every product.