StudweldPro-UK
The UK leader in Stud Welding and Refractory products
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The UK leader in Stud Welding and Refractory products
Insulfrax® Felt is a lightweight, high-performance alkaline earth silicate insulation material manufactured using advanced felting technology. Combining excellent thermal insulation with outstanding flexibility and handling strength, it is ideal for precision-fabricated gaskets, thermal seals and high-temperature insulation components.
Designed for easy cutting, shaping and fabrication, Insulfrax Felt delivers reliable thermal performance while remaining lightweight and durable. Available in a range of thicknesses and sheet sizes, it provides an efficient solution for demanding industrial applications requiring flexible thermal insulation.
Insulfrax Felt combines excellent thermal insulation with exceptional flexibility, making it ideal for fabricated insulation components, thermal sealing systems and precision-engineered industrial applications.
| Property | Insulfrax |
| Classification Temperature | 1200°C |
| Melting Temperature | >1330°C |
| Density Range | 170–270 kg/m³ |
| Typical Chemical Analysis (wt. %) | |
| SiO2 | 61.0-67.0 |
| CaO | 27.0-33.0 |
| MgO | 2.5-6.5 |
| Al2O3 | <1.0 |
| Fe2O3 | <0.6 |
Insulfrax Felt is widely used where lightweight, flexible thermal insulation must be converted into fabricated components, sealing products and high-temperature insulation systems for demanding industrial environments.
Insulfrax Felt is specified across industries requiring lightweight thermal insulation, fabricated sealing products and reliable high-temperature thermal management solutions.
Selecting the correct insulation felt is essential for achieving optimum thermal performance, fabrication efficiency and long-term reliability. Operating temperature, insulation requirements, component geometry and installation conditions should all be considered during material selection.
Our technical team provides support with material selection, fabricated component design and insulation specification, ensuring the most suitable Insulfrax Felt grade is selected for your application.
Speak with our technical specialists to discuss your thermal insulation, sealing or fabricated component requirements. We can help identify the correct Insulfrax Felt specification, thickness and configuration for your application.
