< Borosilicate Foam Glass Block Insulation >  

    Specifications (I) ; - 

   -<Phisical and Thermal Properties of Protex >-      

   Phisical Properties  

      Protex

        ASTM Test

 Absorption of moisture
   (% by volume) 

       0 2% (Mean)

            C240

 Water-Vapor Permeability

       0.0 perm-in

            E96

  Acid Resistance

    Impervious to common acids and their fumes  
        except hydrofluoric acid.

  Combustibility

   Noncombustible,  Will not burn

  Compressive Strength

    Over 150 psi

            C240

  Density

     15ib/CuFt (Average)

            C303

  Dimensional Stability

  Excellent - does not shrink, swell or warp.

  Flexual Strength

    Over 100 psi 

       C240, C203

  Linear Coefficient of
  Thermaql Expansion 

  Less than 9.0x10¡©©ú/ ¡É
       (n=6) 

           E228

  Service Temperature

    -268¡É~482¡É

  Thermal Conductivity

 Less than 0.008kcal/hr §³ ¡É

        C518,C177               

 Chemical Analysis

   SiO©ü

    B©üO©ý

   Al©üO©ý

  Na©üO

  Protex (%)

   6-~73

   5~15

  1.5~2.0

  10~15     

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