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EPS is a unique product that can be manufactured in a wide range of densities and strengths. Most commonly EPS is supplied in a density range from 0.9-2.4 lbs/ft3. The performance properties of EPS in this density range are covered by industry standard ASTM C578. However, some applications require higher strength than covered by ASTM C578.
R-Control EPS can be manufactured to custom high strength performance levels for application subjected to high load conditions. Examples of high strength EPS properties are shown below:
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| High Density EPS Properties1 |
40 PSI |
50 PSI |
60 PSI |
| ASTM C578 Type |
XIV |
- |
- |
| Compressive strength @10% def., min. |
psi
(kPa) |
40
(256) |
50
(345) |
60
(414) |
| Density, min. |
lb/ft 3
(kg/m3) |
2.4
(38.4) |
2.7
(43.2) |
3.0
(48.0) |
Design Thermal Resistance
per 1.0 in. thickness |
40ºF |
ºF•ft2•h/Btu
(ºC•m2/W) |
4.76
(0.84) |
4.76
(0.84) |
4.76
(0.84) |
| 75ºF |
ºF•ft2•h/Btu
(ºC•m2/W) |
4.35
(0.77) |
4.35
(0.77) |
4.35
(0.77) |
Thermal Resistance,min.,
per 1.0 in. thickness |
40ºF |
ºF•ft2•h/Btu
(ºC•m2/W) |
4.60
(0.81) |
4.60
(0.81) |
4.60
(0.81) |
| 75ºF |
ºF•ft2•h/Btu
(ºC•m2/W) |
4.20
(0.74) |
4.20
(0.74) |
4.20
(0.74) |
| Flexural strength, min. |
psi
(kPa) |
60
(414) |
70
(483) |
80
(552) |
Water Vapor Permeance of 1.0 in. thickness,
max., perm |
2.5 |
2.5 |
2.5 |
Water Absorption by total immersion,
max., volume % |
2.0 |
2.0 |
2.0 |
| Oxygen Index min., volume % |
24.0 |
24.0 |
24.0 |
1 When test in accordance with ASTM C578 Test Methods.
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Download a PDF file of our 40 PSI EPS Brochure.
Download a PDF file of our EPS Product Testing Chart.
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