a means for improving the fire resistance of carbonaceous polymeric substance comprising a non - graphitic carbonaceous polymeric material having an loi value greater than 40 , produces a char formation greater than 65 % and a thermoconductivity less than 1 btu ft / hr ft 2 ° f . by utilizing an organosilicone polymer in an amount to provide ignition resistance . also , there is provided a means for improving the fire resistance and thermal stability of resins and polymers .