EXPOL-X XPS Extruded Polystyrene

    Premium extruded polystyrene insulation offering superior moisture resistance and maximum thermal protection for demanding applications.

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    EXPOL-X XPS Extruded Polystyrene Insulation
    for High-Performance Construction

    Building Product Information Sheet

    EXPOL-X represents rigid foam insulation technology, delivering unmatched moisture resistance, thermal efficiency and structural strength in the most demanding construction environments. Manufactured as extruded polystyrene (XPS), EXPOL-X features a closed-cell structure that provides superior water resistance, dimensional stability and long-term insulation performance where other materials may fail.

    Engineered for high-moisture and load-bearing applications, EXPOL-X delivers consistent thermal performance while maintaining structural integrity in extreme conditions. With compressive strength of 250 kPa and minimal water absorption of just 0.03%, it is the premium choice for projects requiring durability, strength and resilience.

    0.03%
    Water Absorption by immersion
    250 Kpa
    Compressive strength @10% deformation
    EXPOL XPS Product

    Key Features & Benefits

    Superior moisture resistance
    Maximum thermal protection
    Closed-cell structure
    High compressive strength
    Dimensional stability
    Premium solution
    Fire-retardant material
    100% Recyclable

    Why Choose XPS?

    Superior Moisture Resistance for Harsh Environments

    EXPOL-X features an advanced closed-cell structure that ensures exceptional moisture resistance and minimal water absorption, making it ideal for below-grade construction, retaining walls and high-humidity applications.

    High Compressive Strength & Structural Stability

    With compressive strength rated at 250 kPa @ 10% deformation, EXPOL-X performs reliably under heavy load-bearing conditions, delivering long-term structural stability and resistance to deformation.

    Maximum Thermal Performance

    EXPOL-X maintains consistent R-values even in wet conditions, ensuring dependable thermal insulation performance throughout the lifespan of the building.

    Learn more about specific applications

    Click a solution below to view installation guides and full system details

    Concrete Floor InsulationConcrete Floor Insulation
    Retaining Wall SolutionsRetaining Wall Solutions
    Masonry Wall InsulationMasonry Wall Insulation
    Cladding InsulationCladding Insulation

    Technical Data

    PropertiesTest Results
    MaterialExpanded Polystyrene
    Density30 kg / m³
    Sheet Size2500 mm x 600 mm
    Thickness / R Value
    10mmR 0.36
    30mmR 1.10
    40mmR 1.45
    50mmR 1.80
    75mmR 2.70
    100mmR 3.60
    Thermal Conductivity (ATSM 168)K – Value 0.028
    Rate of water vapour transmission (max) measured parallel to rise at 23 deg C (AS 2498.5)- mg/m2s
    Permeability (m/s)-
    Compressive Resistance KPA at 1% (AS 2498.3)101 KPA
    Compressive Resistance KPA at 2% (AS 2498.3)207 KPA
    Compressive Resistance KPA at 5% (AS 2498.3)234 KPA
    Compressive Resistance KPA at 10% (AS 2498.3)250 KPA
    Youngs Modulus- MPA
    Cross breaking strength KPA (AS 2498.4)- KPA
    Dimensional stability of length, width & thickness (max) at 70 deg C for 7 days (AS2498.6)- %
    Long term water absorption by immersion (ASTM C72)0.028 %v / v
    Determination of flame propagation surface ignition (AS2122.1-1993)Medium flame duration (max): - sec
    Eighth vale: - sec
    Fire behavior (AS/NZS 1530.3:1999)Spread of flame index (0 – 10): 0
    Smoke developed index (0 – 10): 3
    Recycled Content0%
    RecyclabilityXPS is 100% recyclable
    Environmental StatementXPS is inert and non-toxic. There are no chemicals or gases harmful to the environment emitted from EPS either during manufacture or within use.
    Ozone Depleting PotentialXPS does not contain ozone-depleting CFC or HCFC gases, nor use them in its manufacture. As a result, XPS has zero ozone depletion potential.
    Vermin ResistanceXPS does not offer any nutritive value.

    EXPOL-X Sizes, Warranty & Compliance

    EXPOL-X sheet sizing, warranty and New Zealand Building Code compliance information from the Building Product Information Sheet.

    EXPOL-X sizes, warranty and building code compliance
    SpecificationDetail
    Sheet widths300 mm to 600 mm
    Sheet length2500 mm
    Thickness range10 mm to 100 mm
    Warranty15-year EXPOL XPS Foam Insulation warranty
    NZ Building CodeContributes to B2 Durability (B2.3.1 a, b), E3 Internal moisture (E3.3.1), F2 Hazardous building materials (F2.3.1 a) and H1 Energy efficiency (H1.3.1 a, H1.3.2 e)
    Building Act statusNot subject to a warning or ban under the Building Act 2004

    Source: EXPOL-X Technical Data Sheet and Building Product Information Sheet, linked above. For project-specific advice contact the EXPOL Tech Team.