Technical data sheets, calculators, and tools to help you specify the right EPS foam products for your project.
Explore our technical resources, interactive calculators, and reference materials to make informed decisions about your foam needs.
View the typical physical properties of Expanded Polystyrene (EPS) including density, compressive strength, thermal conductivity, and more across all standard types.
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Use Calculator →Typical physical properties of EPS foam by type designation, per ASTM C578 standards.
| Property | Type XI (0.90 pcf) |
Type I (1.00 pcf) |
Type VIII (1.15 pcf) |
Type II (1.50 pcf) |
Type IX (1.80 pcf) |
Type XIV (2.40 pcf) |
Type XV (3.00 pcf) |
|---|---|---|---|---|---|---|---|
| Density (pcf) ASTM C303 | 0.90 | 1.00 | 1.15 | 1.50 | 1.80 | 2.40 | 3.00 |
| Compressive Strength @ 10% (psi) ASTM D1621 | 5.0 | 10.0 | 13.0 | 15.0 | 18.0 | 25.0 | 40.0 |
| Flexural Strength (psi) ASTM C203 | 18.0 | 25.0 | 30.0 | 40.0 | 50.0 | 60.0 | 75.0 |
| Tensile Strength (psi) ASTM D1623 | 9.4 | 14.5 | 16.7 | 21.7 | 26.1 | 34.8 | 43.5 |
| Shear Strength (psi) ASTM C273 | 11.6 | 16.0 | 19.0 | 22.0 | 27.0 | 38.0 | 48.0 |
| Thermal Conductivity (BTU·in/hr·ft²·°F) ASTM C518 | 0.28 | 0.26 | 0.25 | 0.23 | 0.22 | 0.21 | 0.20 |
| R-Value per inch (hr·ft²·°F/BTU) | 3.6 | 3.85 | 4.0 | 4.35 | 4.55 | 4.76 | 5.0 |
| Water Absorption (% by volume) ASTM C272 | 4.0 | 3.0 | 2.5 | 2.0 | 1.5 | 1.0 | 0.5 |
| Oxygen Index (%) ASTM D2863 | 24.0 | 24.0 | 24.0 | 24.0 | 24.0 | 24.0 | 24.0 |
| Water Vapor Permeance (perm·in) ASTM E96 | 5.0 | 3.5 | 2.5 | 2.0 | 1.5 | 1.0 | 0.6 |
Values shown are typical and may vary by manufacturer. All testing performed per ASTM C578 standard specifications for rigid, cellular polystyrene thermal insulation. Contact SoCal Distribution for specific product data and availability.
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