Starlite was a material invented in the 1960s that allegedly withstood 10,000°C temperatures. Here, NighthawkInLight shows his copycat of the secret recipe, withstanding a still whopping 2000°C at less than 1" thickness. The way it works: when exposed to high temperatures, it expands, creating a carbon foam barrier that pushes the heat away while forming an insulator. The Recipe: 2 parts Flour 1 part Corn Starch 1 part powdered Sugar 1 part Borax 1.5 parts Water When mixed and formed and let dry, you have a fireproof tile with heat resistance claimed to be on par with alumino fire brick, while protecting against both insects and mold. Maybe worthwhile to coat with a resin for extra weather resistance if making tiles for a fire shelter. Maybe an idea to retrofit a room in the house with panels of this on steel studs, I don't know. Get creative. Good luck and Godspeed Source: https://youtu.be/0IbWampaEcM