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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 |
ºFft2h/Btu (ºCm2/W) |
4.76 (0.84) |
4.76 (0.84) |
4.76 (0.84) |
75ºF |
ºFft2h/Btu (ºCm2/W) |
4.35 (0.77) |
4.35 (0.77) |
4.35 (0.77) |
Thermal Resistance,min., per 1.0 in. thickness |
40ºF |
ºFft2h/Btu (ºCm2/W) |
4.60 (0.81) |
4.60 (0.81) |
4.60 (0.81) |
75ºF |
ºFft2h/Btu (ºCm2/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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