The installation or upgrading of mold base or press platen insulation is one of the highest-returning investments a molding operation can make today. Properly insulated molds require less energy to operate. Adequate insulation also facilitates temperature regulation within the tool.

GlasTherm thermal insulating sheet is a preferred option for most mold insulation applications. GlasTherm sheet offers significant advantages when compared to other materials such as meca, asbestos concrete or calcium silicate.

Some of GlasTherm properties:

  • Efficient thermal barrier
  • High mechanical strength and toughness to resist the effects of molding pressure and rough handling
  • Resistant to oil and water absorption
  • Completely asbestos-free.

Form: Sheet

Thickness: ¼” (6.35mm), 3/8” (9.525mm), ½” (12.7mm), ¾” (19.05mm), 1” (25.4mm)

Colour – White

Standard Sheet Size: 1220mm x 2440mm


Material Specification

Comparative Information ASTM Procedure Units Grade HT200
Continuous use temperature °F/ °C 412/ 200
Maximum service temperature °F/ °C 550/ 285
Compressive strength at 75oF D 695 Psi 49,000
Compressive strength at 392oF D 695 Psi 18,000
Water absorption D 570 % by weight 0.2
Thermal conductivity C 177 Btu•In/Hr•Ft2 °F 1.9

NOTE: All of the information, suggestions and recommendations pertaining to the properties and uses of the product described herein are based upon tests and data believed to be accurate; however, the final determination regarding the suitability of the material described herein for the use contemplated, the manner of such  use, and whether the use infringes any patents is the sole responsibility of the user. THERE IS NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION WARRANTY OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR PURPOSE. Under no circumstances shall we be liable for incidental or consequential loss or damage.

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NOTE: The information stated in the table above are typical values intended for reference and comparison purposes only. It may NOT be used as a basis for design specifications or quality control. Enquire for complete manufacturers’ specifications.