1. A silicone composite comprising: a silicone mixture and a thermally decomposable inorganic filler which can be decomposed at a temperature of 500° C. and below, wherein said inorganic filler is from about 10 weight % to about 90 weight % of said silicone composite, wherein said silicone composite when exposed to a high temperature forms at least a portion of an inorganic composite and maintains its dimensional stability wherein said silicone composite has a viscosity from about 10000 to about 1000000 Pa·S at a shear rate of 1.0 rads/s at 25 degrees C., and a density of about 1.3 to about 1.8 g/cm³ and wherein said silicone mixture comprises a liquid high consistency silicone rubber and a solid high consistency silicone rubber, said solid high consistency rubber is a solid at 25-250° C., has a Mooney viscosity of about 10 to about 200 and with a hardness from Shore A 10 to Shore A 90.