By combining different materisals and taking into account their thermal, chemical and mechanical resistance as well as their fatigue properties, multi-layered expansion joints are used within many industries, for example power generation. The multi-layered expansion joint design comprises four groups of material: An outer cover material, which in most cases is coated or laminated, protects the expansion joint from pressure and temperature and guarantees form stability. A gas sealing foil is the actual sealing element, usually embedded between fabric layers or integrated in the outer cover. Very strong and temperature-resistant fabrics are used to protect the gas sealing foil and/or the insulation materials. The layer of insulation materials protects both the gas sealing foil and the other expansion joint materials from high temperatures of the medium.