Thermiculite® Critical Service Series gasket material, it is exclusive to Flexitallic, and this revolutionary material, comprised of chemical and thermally exfoliated vermiculite, simulated structure of exfoliated graphite, with one notable exception – it maintains integrity through a wide range of extreme temperatures. This innovative and versatile material is available in Coreless Sheet and Spiral Wound Filler styles, and is suitable for replacing aramid fiber, glass fiber, carbon fiber, PTFE and Graphite in a wider array of applications. Since its inception, Thermiculite® gasket material has proven itself as an effective long-term sealing solution in over 500 of the most demanding industrial sealing applications, with the combination of Thermiculite® Critical Service (800 Series) and Thermiculite® Performance (700 Series), a single, proven material can be used for virtually all of your sealing requirements. That’s why we call Thermiculite® The Total Static Sealing Solution.