Polystyrene Foam (EPS) Physical Data Sheet

Product General and Technical Information
Date: 12/10/2014 Name: Expanded Polystyrene Foam
(3pcf / Type L300)
General Information
Expanded Polystyrene, or EPS, has a range of densities and applications, including arts and crafts, insulation, and packaging.

Property (ASTM C 578-92(all)) Values
(1LB)
Values
(2LB)
Values
(3LB)

Density (LB/Cubic Ft.)

1.02

2.00

3.00

Thermal Conductivity
(Btu-in/hr-Sq.Ft. - °F)
@ 25°F / @ 40°F / @ 75°F

0.23 / 0.24 / 0.26

0.20 / 0.21 / 0.23

0.17 / 0.18 / 0.20

Thermal Resistance
(R-Value @ 1" Thick)
@ 25°F / @ 40°F / @ 75°F

4.35 / 4.17 / 3.85

5.00 / 4.76 / 4.35

5.65 / 5.35 / 4.85

Compressive 10% Deformation (PSI)

12

29

46

Flexural (PSI)

27

63

99

Tensile (PSI)

18

26

34

Shear (PSI)

20

36

52

Shear Modulus (PSI)

300

620

940

Modulus of Elasticity (PSI)

200

480

760

WVT (perm. in)

3.5

1.3

0.7

Absorption (%) vol. Max.

4.0

2.0

1.0

Capillarity

NONE

NONE

NONE

Coefficient of Thermal Expansion in./(in.)(°F)

0.000035

0.000035

0.000035

Maximum Service Temperature (°F)
Long-term / Short-term

167 / 180

167 / 180

167 / 180

Oxygen Index (%)

24.0

24.0

24.0

Contains Fire Retardant Additives

Yes

Yes

Yes

1LB Polystyrene
Density (LB/Cubic Ft.) 1.02
Thermal Conductivity
(Btu-in/hr-Sq.Ft. - °F)
@ 25°F / @ 40°F / @ 75°F
0.23 / 0.24 / 0.26
Thermal Resistance
(R-Value @ 1" Thick)
@ 25°F / @ 40°F / @ 75°F
4.35 / 4.17 / 3.85
Compressive 10% Deformation (PSI) 12
Flexural (PSI) 27
Tensile (PSI) 18
Shear (PSI) 20
Shear Modulus (PSI) 300
Modulus of Elasticity (PSI) 200
WVT (perm. in) 3.5
Absorption (%) vol. Max. 4.0
Capillarity NONE
Coefficient of Thermal Expansion in./(in.)(°F) 0.000035
Maximum Service Temperature (°F)
Long-term / Short-term
167 / 180
Oxygen Index (%) No
Contains Fire Retardant Additives No
2LB Polystyrene
Density (LB/Cubic Ft.) 2.00
Thermal Conductivity
(Btu-in/hr-Sq.Ft. - °F)
@ 25°F / @ 40°F / @ 75°F
0.20 / 0.21 / 0.23
Thermal Resistance
(R-Value @ 1" Thick)
@ 25°F / @ 40°F / @ 75°F
5.00 / 4.76 / 4.35
Compressive 10% Deformation (PSI) 29
Flexural (PSI) 63
Tensile (PSI) 26
Shear (PSI) 36
Shear Modulus (PSI) 620
Modulus of Elasticity (PSI) 480
WVT (perm. in) 1.3
Absorption (%) vol. Max. 2.0
Capillarity NONE
Coefficient of Thermal Expansion in./(in.)(°F) 0.000035
Maximum Service Temperature (°F)
Long-term / Short-term
167 / 180
Oxygen Index (%) 24.0
Contains Fire Retardant Additives Yes
3LB Polystyrene
Density (LB/Cubic Ft.) 3.00
Thermal Conductivity
(Btu-in/hr-Sq.Ft. - °F)
@ 25°F / @ 40°F / @ 75°F
0.17 / 0.18 / 0.20
Thermal Resistance
(R-Value @ 1" Thick)
@ 25°F / @ 40°F / @ 75°F
5.65 / 5.35 / 4.85
Compressive 10% Deformation (PSI) 46
Flexural (PSI) 99
Tensile (PSI) 34
Shear (PSI) 52
Shear Modulus (PSI) 940
Modulus of Elasticity (PSI) 760
WVT (perm. in) 0.7
Absorption (%) vol. Max. 1.0
Capillarity NONE
Coefficient of Thermal Expansion in./(in.)(°F) 0.000035
Maximum Service Temperature (°F)
Long-term / Short-term
167 / 180
Oxygen Index (%) 24.0
Contains Fire Retardant Additives Yes


All values reported are typical values. We cannot guarantee the applicability or the accuracy of this information or the suitability of the product for any particular purpose. This product is sold without warranty, expressed or implied. (Unless stated otherwise.) Buyer assumes all responsibility for loss or damage arising from the handling and use of this product, whether done in accordance with directions or not. Statements concerning the possible use of this product are not intended as recommendation to use this product in the infringement of any patent.