Sarnatherm® MPS
Sarnatherm® MPS is a rigid, closed cell, molded polystyrene insulation board that is used in Sika waterproofing applications.
- High compressive strength: 40 psi and 60 psi
- Stable long-term R-value
- Moisture resistant
Usage
Wherever insulation is required within a waterproofing protected membrane assembly (PMA). AREAS OF APPLICATION- Green Roofs
- Plaza Decks
Advantages
- High compressive strength: 40 psi and 60 psi
- Stable long-term R-value
- Moisture resistant
Packaging
- 4 ft x 8 ft (1.2 m x 2.4 m)
- Various Thicknesses
Product Details
APPROVALS / STANDARDS
- ASTM C 578, Type XIV (40 psi)
- ASTM C 578, Type XV (60 psi)
- UL Classified
Chemical Base
Polystyrene Foam Core
Shelf Life
N/A
Storage Conditions
When stored outdoors, the insulation should be stacked on pallets at least 4” (102 mm) above the surface level and protected from exposure to direct sunlight and weather using an opaque, light-colored tarpaulin. Do not use a dark colored tarpaulin. The factory applied packaging is intended only for protection during transit and should only be slit enough to prevent accumulation of condensation then removed prior to immediate use. Insulation that becomes wet or damaged should be removed and replaced with dry insulation
Thickness
40 psi
| Thickness | R-Value1 | RSI1 |
| 1" (25 mm) | 4.4 | 0.77 |
| 1-1/8" (29 mm) | 5 | 0.88 |
| 1-1/2" (38 mm) | 6.6 | 1.16 |
| 1-11/16" (43 mm) | 7.5 | 1.32 |
| 2" (51 mm) | 8.8 | 1.55 |
| 2-1/4" (57 mm) | 10 | 1.76 |
| 2-1/2" (63 mm) | 11 | 1.94 |
| 3" (76 mm) | 13.2 | 2.32 |
| 3-3/8" (86 mm) | 15 | 2.64 |
| 4" (102 mm) | 17.6 | 3.10 |
| 4-1/2" (114 mm) | 20 | 3.52 |
| 6" (152 mm) | 26.4 | 4.65 |
| 6-3/4" (171 mm) | 30 | 5.28 |
| 8" (203 mm) | 35.2 | 6.20 |
60 psi
| Thickness | R-Value1 | RSI1 |
| 1" (25 mm) | 4.5 | 0.79 |
| 1-1/8" (29 mm) | 5 | 0.88 |
| 1-1/2" (38 mm) | 6.8 | 1.19 |
| 1-11/16" (43 mm) | 7.5 | 1.32 |
| 2" (51 mm) | 9 | 1.59 |
| 2-1/4" (57 mm) | 10 | 1.76 |
| 2-1/2" (63 mm) | 11.3 | 1.98 |
| 3" (76 mm) | 13.5 | 2.38 |
| 3-3/8" (86 mm) | 15 | 2.64 |
| 4" (102 mm) | 18 | 3.17 |
| 4-1/2" (114 mm) | 20 | 3.52 |
| 6" (152 mm) | 27 | 4.76 |
| 6-3/4" (171 mm) | 30 | 5.28 |
| 8" (203 mm) | 36 | 6.34 |
1 R-value at 75°F (24°C)
Density
| 40 psi | 60 psi |
| 2.4 lb/ft3 (40 kg/m3) | 3.0 lb/ft3 (48 kg/m3) |
Compressive Strength
| 40 psi (276 kPa) 60 psi (414 kPa) | (ASTM D-1621) |
Flexural Strength
| 40 psi | 60 psi |
| 60 psi (414 kPa) | 75 psi (517 kPa) |
Thermal Conductivity
K-value per inch, Btu·in/°F·ft2·h (W/°K·m)
40 psi
| at 25°F (-4°C) | at 40°F (5°C) | at 75°F (24°C) |
| 0.20 (0.029) | 0.21 (0.030) | 0.23 (0.033) |
60 psi
| at 25°F (-4°C) | at 40°F (5°C) | at 75°F (24°C) |
| 0.20 (0.028) | 0.21 (0.030) | 0.22 (0.032) |
Thermal resistance
R-value per inch, °F·ft2·h/Btu (°K·m2/W)
40 psi
| at 25°F (-4°C) | at 40°F (5°C) | at 75°F (24°C) |
| 5.0 (0.88) | 4.8 (0.85) | 4.4 (0.77) |
60 psi
| at 25°F (-4°C) | at 40°F (5°C) | at 75°F (24°C) |
| 5.1 (0.90) | 4.9 (0.86) | 4.5 (0.79) |
Service Temperature
165°F (74°C)
Water Absorption
| 0.3 % after 24 hrs ambient storage | (ASTM C-272) |
Permeability to Water Vapor
| 2.5 perm at 1" thickness | (ASTM E-96) |
Reaction to Fire
| Flame Spread: <25 Smoke Development: <450 | (ASTM E-84) |
Application
APPLICATION INSTRUCTIONS
Sarnatherm MPS is installed by a Sarnafil Authorized Applicator. It is installed over the membrane in PMA waterproofing systems; the overburden is utilized to hold the insulation in place. Polystyrene must not come in contact with PVC. Always place a separation layer between the Sarnatherm MPS and the membrane.