Product Data Sheet Safety Data Sheet Show all documents
Sarnatherm® MPS

Sarnatherm® MPS

Rigid, closed cell, molded polystyrene insulation board

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
Product Data Sheet Safety Data Sheet Show all documents

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

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • ASTM C 578, Type XIV (40 psi)
  • ASTM C 578, Type XV (60 psi)
  • UL Classified
 
Product Information

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)50.88
1-1/2" (38 mm)6.61.16
1-11/16" (43 mm)7.51.32
2" (51 mm)8.81.55
2-1/4" (57 mm)101.76
2-1/2" (63 mm)111.94
3" (76 mm)13.22.32
3-3/8" (86 mm)152.64
4" (102 mm)17.63.10
4-1/2" (114 mm)203.52
6" (152 mm)26.44.65
6-3/4" (171 mm)305.28
8" (203 mm)35.26.20

60 psi

Thickness

R-Value1

RSI1

1" (25 mm)

4.5                    

0.79                 

1-1/8" (29 mm)50.88
1-1/2" (38 mm)6.81.19
1-11/16" (43 mm)7.51.32
2" (51 mm)91.59
2-1/4" (57 mm)101.76
2-1/2" (63 mm)11.31.98
3" (76 mm)13.52.38
3-3/8" (86 mm)152.64
4" (102 mm)183.17
4-1/2" (114 mm)203.52
6" (152 mm)274.76
6-3/4" (171 mm)305.28
8" (203 mm)366.34

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)
Technical Information

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 steps

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.

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