Protective barrier

A protection product having thermal and acoustic barrier characteristics such that the product satisfies the requirements of the standard set forth in 14 CFR, part 25 by the Federal Aviation Administration, as amended in September 2000, the product being designed to be applied along metallic and composite structures, said protection product being essentially in the form of a mat comprising one or several fibre layers enclosed in a sheath, wherein the sheath comprises:

• at least one first support, and an impregnated mica paper, the mica paper having a weight per unit area of less than 30 g/m2and comprising flakes of mica with a form factor greater than 1000, wherein the impregnated mica paper consists essentially of mica and a binder or resin prior to impregnation, and wherein the protection product comprising the impregnated mica paper satisfies said requirements of the standard set forth in 14 CFR, part 25.