Rigid Laminate Sheets

Glastherm HT High-Temperature Insulation Board
High Compressive Strength Thermal Insulation for Tooling & Industrial Applications

Glastherm HT is a high-performance, glass fibre-reinforced insulation laminate engineered for elevated temperature environments and heavy mechanical loads. Designed for thermal insulation in moulds, presses, and high-temperature tooling, it provides excellent thermal isolation while maintaining structural integrity under compression.

With a maximum service temperature of 288°C and outstanding compressive strength retention at elevated temperatures, Glastherm HT is ideal for applications where both heat resistance and load-bearing performance are critical.

Product Highlights:

• Thicknesses Available: Supplied to specification — provide your required thickness when submitting a quote request
• Temperature Resistance: Maximum service temperature 288°C
• Sheet Dimensions: 1220 mm x 1220 mm
• Colour: Cream
• Supply Format: Available as full sheets, cut panels, or CNC machined parts to your drawings

Key Benefits:

• High compressive strength with excellent load-bearing performance
• Maintains mechanical integrity at elevated temperatures
• Low thermal conductivity for effective heat isolation
• Reduces heat loss and improves temperature control in tooling systems
• Low moisture absorption (0.2%) for stable performance in industrial environments 
• Resistant to oil and moisture in demanding operating conditions
• Suitable for machining using standard metalworking equipment

Mechanical & Thermal Performance:

• Compressive Strength: Up to 338 MPa at room temperature, maintaining 117 MPa at 288°C
• Flexural Strength: 214 MPa
• Thermal Conductivity: 0.27 W/(m·K) 
• Density: 1.97 g/cm³ 

Glastherm HT is commonly used in mould insulation, press insulation plates, high-temperature tooling systems, and industrial equipment requiring thermal stability under load.

For flexible high-temperature insulation, see Glastic FHT Flexible Laminate. For rigid electrical insulation laminates, see Glastic Fibreglass Laminate.

Need CNC-machined insulation components or cut-to-size panels? Request a quote below and enter all of your specifications

Request A Quote - Glastherm HT