composite layer resistant to fire for cable or accessory cable

The present invention relates to a composite composition based on at least one aluminosilicate geopolymer composition and at least one organic oligomer or polymer of low viscosity, to its preparation process, to a device comprising a cable and / or an accessory cable, said cable and / or cable to said accessory comprising at least one composite layer obtained from said composite composition, and a method of manufacturing such a device.