Thermal insulation millboards BA are produced on the basis of made of mineral alkaline earth silicate fibres (AES) with a classification temperature of 1300⁰C (EN 1094-1) using heat-resistant fillers and binders. Due to its advantages, as low density, excellent thermo-insulation, resistance to thermal shock, thermal resistance and ease of processing, it is widely used in power engineering, metallurgy, foundry and in the ceramic industry at working temperatures up to 1150⁰C. Paper technology used in the production consists in orderly arrangement of fibers, thanks to which the millboard is resistant to significant mechanical loads and can be used as a sealing material.