Polyester-based compositions with increased glow-wire resistance include at least one filler for improving thermal conductivity, preferably aluminum oxide, boron nitride or aluminium silicate, particularly preferably aluminium silicate, with particular preference aluminium silicate with triclinic-pinacoidal crystal structure. Methods for production of the polymer-based compositions and to products to be produced therefrom are also provided. The products may include products for the electrical and electronics market, preferably devices for domestic use. Also disclosed is the use of aluminium oxide, boron nitride or aluminium silicate, particularly preferably of aluminium silicate, with particular preference of aluminium silicate with triclinic-pinacoidal crystal structure, for improving the glow-wire resistance of products for the electrical and electronics market, preferably of devices for domestic use.