Thermal conductivity

The thermal characteristics of plastic foam depend mainly on the thermal conductivity of the cell walls and the cell gas, as well as radiation and convection. The cell gas is the most significant factor in deter-mining the overall heat transfer characteristics. The thermal conductivity of some plastic foam will vary due to changes in the composition of the cell gas with time.
In addition to the product specific parameter of the change of the thermal conductivity of plastic foams.

Compressive strength

The compressive strength of the thermal insulation materials is determined by short-term standard test methods. For structural applications involving continuous high compressive load (parking decks and cold stores), non-uniform loads or high temperature, provide an adequate safety factor or design stress levels to minimize deformation of the foam board with time.

Acoustic properties

Due to its rigid closed-cell structure and resonance behavior, X FOAM is not an effective sound absorption material. It is comparable to wood, plaster, bricks or other traditional building materials

Fire protection performance

As all other organic substances, X FOAM is combustible. If a flame retardant is used, X FOAM is classified as (B2) class material according to DIN 4102 and as (A) class material according to BS3837, considered as self extinguishing, difficult to ignite material. X FOAM performs satisfactorily from aflame-spread and smoke development point of view for all recommended applications according to (ULI.790) - ASTM E 84 Standard Test under designation of ASTM C 578-95.
Polystyrene foams start to soften and shrink from 100C. They melt at even higher temperatures. If the melted mass gets further heated, ignitable decomposition gases are created at about 350C.  

Water Vapor Diffusion Resistance Factor

The water vapor diffusion resistance factor is the ratio of water vapor diffusion resistance of a mate- rial to that of still air having the same thickness and temperature.

Water Resistance properties

In any application, thermal insulation materials must remain dry in order to maintain their thermal resistance. It should be noted that the thermal conductivity of water is 24 times greater than that of air, Therefore resistance to water absorption is an important factor to be considered in the selection of insulation materials. The high temperature and relative humidity in many areas of the Middle East require that thermal insulation materials have high resistance to water vapor transmission. Extensive testing has been carried out to quantify the capability of various insulation materials to resist moisture absorption It should be
Recognized that condition which cause water absorption-in thermal insulation materials in practical applications are varied and complex. Simple laboratory water absorption tests are useful as guidance to the selection of insulation materials suitable for use where water or water vapor is present. (ASTM D 2842)

Chemical Resistance

X FOAM is resistant to most commonly occurring construction materials like solvent-free bituminous compounds, water-based wood preservatives, lime, cement, plaster, anhydrous gypsum as well as alcohols, acids and alkalis. Certain organic materials like solvent based wood preservatives, coal tar and derivatives (cresol, etc.) paint thinners and common solvents such as acetone, ethyl acetate, petrol toluene and white spirit will attack Styrofoam resulting in softening, shrinking and even

Environment benefit

Reduce Energy:  The use of X FOAM products, especially insulating sheathing, reduces the amount of energy (i.e., gas, oil and electric) required to maintain comfortable living environments. Thus, energy loss in buildings is greatly reduced.
Reuse and Recycle X FOAM is manufactured from polystyrene resin, which is a thermoplastic material.           This means that it can be melted and re-inserted into the manufacturing process to produce new X FOAM insulation.

Light Stability

Prolonged exposure of X FOAM to direct sunlight (UV-Radiation) will cause yellowing and deterioration of the surface cellular structure, therefore, X FOAM should be adequately protected. Deterioration due to limited exposure will usually affect the insulation efficiency significantly. To prevent excessive ultraviolet exposure,      a light colored protective covering should be used during storage and after installation. In cases where any bonding of X FOAM surfaces in necessary, the yellow surface needs to be brushed off.

Site Handling and storage

X FOAM blue extruded polystyrene insulation boards should be stored on a clean, flat surface in an area free from open flammable materials. They can be stored outside, but should be protected against intense sunlight, preferably by retention in their original packaging. When stored indoors, good general ventilation should be sufficient for most conditions. X FOAM insulation boards should not be exposed to flame or other ignition sources. Exposed to intense sunlight over prolonged periods, the surface of the boards degrades into fine dust.

XFOAM Extruded Polystyrene




X Foam 35

X Foam 40


DIN 53420


32 - 35

36- 40


Thermal conductivity

Laboratory value at 10 C mean test temperature 


ASTM C177 or         ASTM C518




Compressive strength at 10% deflection ( 50mm thick

ASTM D1621-73




Water absorption

DIN 53428

%by Vol.



* Thickness : 20,25,30,40,50,60 mm
* Length     : 1000,1210,1250,2500 mm
* Width       : 600,610,650,1200 mm
* Special: dimensions are available abon requist