Product Data Sheet
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Sarnatherm® XPS (MY)

Extruded Polystyrene Thermal Insulation Board

Sarnatherm® XPS (MY) is a rigid insulation board based on extruded polystyrene. The boards are part of the Sika® Sarnafil® and Sikalastic® flat roof system.

  • Excellent thermal insulation properties
  • Low weight
  • Easy to install
  • Good form stability
  • Recyclable
  • Closed cell structure minimising water absorption
  • High compression strength
Product Data Sheet
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Usage

Thermal insulation as part of an inverted roof construction, laid over the waterproofing layer, in the following roofing systems:
  • Sika® Sarnafil® sheet membrane
  • Sikalastic® liquid applied membrane flat roof system
 

Advantages

  • Excellent thermal insulation properties
  • Low weight
  • Easy to install
  • Good form stability
  • Recyclable
  • Closed cell structure minimising water absorption
  • High compression strength

Packaging

Boards wrapped in LDPE sheet (number depending on board thickness)

Colour

Yellow

Product Details

Product Information

Composition

Extruded Polystyrene (XPS)

Shelf Life

The product does not expire if properly stored.

Storage Conditions

Store boards protected in a dry location protected from direct sunlight, rain and snow.

Density

35 kg/m³ (available in higher density, subject to MOQ)

(ASTM D 1622:2014)

Dimensions

Length

1.2 m

Width

0.6 m

Thickness

25 mm & 50 mm (available in different thicknesses, subject to MOQ)
System information

System Structure

Ancillary, complementary products:

  • S-Felt; separation layer
  • Sika® Sarnafil® PVC membrane and system components
  • Sikalastic® liquid applied membrane systems

Compatibility

Sarnatherm® XPS (MY) is not compatible with:

  • Solvents of all kinds
  • Heat / Fire of all kinds
  • Flexible PVC membranes (a separation layer is required)
Technical Information

Compressive Strength

≥ 420 kPa

(ASTM D1621:2010)

Reaction to Fire

Roofs incorporating Sarnatherm® XPS (MY) typically achieve Class 1 Certification of surface spread of flame with
minimum 20 mm of gravel ballast finishes.

(BS476: Part 7:1997)

Thermal Conductivity

≤ 0.027 [W/(m*K)]

(ASTM C518:2015)

Water Absorption

< 0.54 %

(ASTM C272:2001 Reapproved 2007)

Application

Application steps

SUBSTRATE QUALITY

The substrate should be smooth, dry and strong enough to support the Sika® Sarnafil® or Sikalastic® roof system.

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