I am prototyping a high-temperature oven made from ceramic fiberboards. The oven will reach temperatures of up to 800°C. Due to the nature of the prototype, I would like to be able to quickly change our components and would like to avoid permanently fixing anything. I am looking for materials like wire, string, or zip ties that can withstand high heats, have low thermal conductance and specific heats.
An example of something I need to secure impermanently is a thermocouple.