Glastherm® HT Distributors

We sell sheet stock or cut-to-size and CNC machined to your specifications.

Glastherm HT Distributor insulation boards that are white, gold, and silver colored

Glastherm® HT Engineered Materials from a Glastherm Distributor

Glastherm® HT200 | Glastherm® HT220 | Glastherm® HT250 | Glastherm® HT300 | Glastherm® HT500 | Glastherm® HT550 | Glastherm® HTLC

As an authorized Glastherm distributor, we provide premium Glastherm HT materials available directly from stock and customizable into cut-to-size, machined, stamped, or die-cut components to match your production needs. Glastherm® HT is engineered for high-performance perimeter thermal insulation, offering excellent heat resistance and stability. It helps reduce energy usage, minimize heat loss, and improve efficiency in rubber molding, thermoset molding, and other high-temperature applications.

Glastherm® HT 200

Glastherm® HT 200 is a fiberglass-reinforced, mineral-filled insulating sheet designed for medium-temperature molding applications. It provides exceptional compressive strength and thermal insulation while being easy to machine and handle in industrial environments.

Applications: Ideal for plastic and zinc die-casting molds and presses operating up to 392°F (200°C).

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
12 mm, 22 mm, 27 mm ± 0.2mm 96.25″ x 49.4″
**Contact customer service 440-632-5800 for additional Glastherm sizes/specifications.

Glastherm® HT220

This is a thermal insulating sheet that combines low thermal conductivity with very high compressive strength.

Glastherm HT 200 is a durable heat insulation solution perfect for high-temperature processes in industries like chemical processing, mechanical engineering, pipelines, and oil and gas. Designed for plastic and zinc die-casting molds, it offers excellent thermal insulation, enabling rapid heating and quick start-up.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
6mm, 8mm, 10mm, 12mm, 15mm, and 20mm
*Jaco can provide any thickness		 ± .002″
± .05mm		 48″ x 96″
**Contact customer service 440-632-5800
for additional Glastherm sizes/specifications.

Property Procedure English Units Typical Values Metric Units Typical Values
General Information
Part Number
Standard Color Light Beige Light Beige
Maximum Service Temp. °F 608 °C 350
Continuous Use Temp. °F 450 °C 220
Mechanical Properties
Flexural Strength ASTM D790 Psi 52,200 Mpa 360
Compressive Strength @68°F / 20°C ASTM D695 Psi 72,500 Mpa 500
Compressive Strength @302°F / 150°C ASTM D695 Psi 55,100 Mpa 380
Compressive Strength @392°F / 200°C ASTM D695 Psi 40,600 Mpa 280
Compressive Strength @550°F / 288°C ASTM D695 Psi 35,000 Mpa 250
Compressive Modulus ASTM D695 Psi 2,610,000 Mpa 18,000
Physical Properties
Water Absorption ASTM D570 % by wt. 0.2 % by wt. 0.2
Specific Gravity ASTM D792 lbs/ft3 1.85 g/cm3 1.85
Thickness Tolerance inches ±0.004 mm ±0.10
Coefficient of Thermal Expansion – Across Thickness ASTM D696 In/In/°Cx10-5 5.7 10-6/K 5.7
Coefficient of Thermal Expansion – Across Surface ASTM D696 In/In/°Cx10-5 1.3 1.3
Thermal Conductivity ASTM C177 BTU•In/Hr•Ft2•°F 1.75 W/m•K 0.25

Glastherm® HT250

A thermal insulating sheet that is employed to save energy during pressing. Used primarily in hydraulic, wood and tire presses.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
6mm, 8mm, 10mm, 12mm, 15mm, and 20mm
*Jaco can provide any thickness		 ± .002″
± .05mm		 48″ x 96″
**Contact customer service 440-632-5800
for additional Glastherm sizes/specifications.

Property Procedure English Units Typical Values Metric Units Typical Values
General Information
Part Number 9921 9921
Standard Color Light Green Light Green
Maximum Service Temp. °F 752 °C 400
Continuous Use Temp. °F 482 °C 250
Mechanical Properties
Flexural Strength ASTM D 790 Psi 43,500 Mpa 300
Compressive Strength @68°F / 20°C ASTM D 695 Psi 87,000 Mpa 600
Compressive Strength @356°F / 180°C ASTM D 695 Psi 65,200 Mpa 450
Electrical Properties
Electrical Strength – Perpendicular S/T in air ASTM D 149 Vpm 300 kV/mm 12
Physical Properties
Water Absorption ASTM D 570 % by wt. .15 % by wt. .15
Specific Gravity ASTM D 792 lbs/ft3 2.0 g/cm3 2.0
Thickness Tolerance 5 – 10 mm inches ±0.039 mm ±0.10
Thickness Tolerance 11 – 20 mm inches ±0.006 mm ±0.15
Thickness Tolerance 21 – 50 mm inches 1% of thickness mm 1% of thickness
Coefficient of Thermal Expansion – Across Thickness ASTM D 696 In/In/°Cx10-5 11.6 10-6/K 116
Coefficient of Thermal Expansion – Across Surface ASTM D 696 In/In/°Cx10-5 1.3 1.3
Thermal Conductivity ASTM C 177 BTU•In/Hr•Ft2•°F 1.54 W/m•K .23
Glastherm Distributor Insulation Sheet | Glastherm HT
Glastherm Distributor

Glastherm® HT 300

Glastherm® HT 300 offers a high-performance solution for applications with sustained temperatures up to 572°F (300°C). It combines durability, high compressive strength, and dimensional stability, making it an excellent choice for heavy-duty press and mold insulation.

Applications: Suited for platen insulation and tooling in high-heat industrial processes.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
18 mm, 23 mm, 27 mm ± 0.2mm 84.6″ x 44.5″
**Contact customer service 440-632-5800 for additional Glastherm sizes/specifications.

Glastherm® HT 500

Glastherm® HT 500 is built for extreme temperatures, offering outstanding insulation up to 932°F (500°C). It is non-combustible and maintains structural integrity under high compressive loads, even during rapid temperature fluctuations.

Applications: Ideal for high-temp press systems, thermal shields, and insulation in metal processing or semiconductor manufacturing.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
5 mm, 10 mm, 15 mm, 20 mm ± 0.2mm 39.4″ x 47.2″
**Contact customer service 440-632-5800 for additional Glastherm sizes/specifications.

Glastherm® HT 550° F

A fiberglass-reinforced, mineral-filled sheet with heat-resistant polyester thermosetting resin. Recommended for thermal barrier applications where operating temperatures do not exceed 550° F.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
.125″ – 2″
7.3-25.4mm		 ± .002″
± .05mm		 36″ x 72″
48″ x 96″
**Contact customer service 440-632-5800
for additional Glastherm sizes/specifications.

Glastherm® HT LC

Glastherm® HT LC (Low Conductivity) delivers top-tier thermal insulation performance in thinner layers. Designed to provide a high-performance thermal barrier where space or weight constraints matter.

Applications: Perfect for mold insulation, compact press systems, and portable applications requiring minimized insulation thickness.

Glastherm® HT Stock Sizes

Thickness Standard Tolerance Standard Sheet
16.5 mm, 26.5 mm, 42 mm, 52 mm, 64 mm ± 0.2mm 96.1″ x 48″
**Contact customer service 440-632-5800 for additional Glastherm sizes/specifications.

Glastherm Insulation

Glastherm thermal insulating sheets are an ideal solution for mold insulation, providing notable benefits over alternatives like mica, asbestos concrete, or calcium silicate. Designed for efficiency and durability, Glastherm sheets withstand molding pressure and endure rough handling, making them a reliable choice for thermal barrier applications.

FAQ About Glastherm HT

“Glastherm” typically refers to a brand or trade name associated with certain thermal insulation materials, specifically thermal insulating sheets or pads. These materials are often used in industrial applications to provide thermal management and insulation in various systems.

One common type of material known by the name Glastherm is a glass-reinforced thermosetting polyester sheet. This material is known for its high-temperature resistance and is often used as a thermal insulator in applications such as electrical and electronic devices, where it helps manage heat generated by components.