Stabilizer composition comprising: (A) an UV absorber as component A, wherein the UV absorber A is composed of one or more oxalanilide compounds according to formula (I) wherein R a and R b are independently of one another selected from hydrogen, alkyl groups having from 1 to 20 carbon atoms, alkoxy groups having from 1 to 20 carbon atoms and 1 to 4 oxygen atoms; (B) a hindered amine light stabilizer as component B, (C) an antioxidant as component C, wherein the antioxidant C is composed of one or more phenolic compounds according to the formulas (III)a and/or (III)b: wherein R x and R y are independently of one another selected from hydrogen, halogen or an alkyl group having from 1 to 10 carbon atoms; R z is selected from hydrogen or an alkyl group having from 1 to 10 carbon atoms; R w is selected from a hydroxy group, an alkoxy group having from 1 to 18 carbon atoms, a phenyl alkoxy group having from 1 to 4 alkyl carbon atoms, a cycloalkoxy group having from 5 to 8 carbon atoms, or a group of formula (III)c in which Z 1 and Z 2 are independently of one another selected from hydrogen, an alkyl group having from 1 to 18 carbon atoms, a phenyl group and a cycloalkyl group having from 5 to 8 carbon atoms; X is selected from -O-(CH 2 ) q -O-; -(OCH 2 -CH 2 ) q -O-; -O-(CH 2 ) q -S-(CH 2 ) q -O;-NH-(CH 2 ) q -NH-; -NH-NH-, with q is an integer from 1 to 12, or a group and p is zero or an integer from 1 to 6; (D) optionally at least one diluent as component D, and (E) optionally at least one further additive as component E. (A) an UV absorber as component A, wherein the UV absorber A is composed of one or more oxalanilide compounds according to formula (I) wherein R a and R b are independently of one another selected from hydrogen, alkyl groups having from 1 to 20 carbon atoms, alkoxy groups having from 1 to 20 carbon atoms and 1 to 4 oxygen atoms; (B) a hindered amine light stabilizer as component B, (C) an antioxidant as component C, wherein the antioxidant C is composed of one or more phenolic compounds according to the formulas (III)a and/or (III)b: wherein R x and R y are independently of one another selected from hydrogen, halogen or an alkyl group having from 1 to 10 carbon atoms; R z is selected from hydrogen or an alkyl group having from 1 to 10 carbon atoms; R w is selected from a hydroxy group, an alkoxy group having from 1 to 18 carbon atoms, a phenyl alkoxy group having from 1 to 4 alkyl carbon atoms, a cycloalkoxy group having from 5 to 8 carbon atoms, or a group of formula (III)c in which Z 1 and Z 2 are independently of one another selected from hydrogen, an alkyl group having from 1 to 18 carbon atoms, a phenyl group and a cycloalkyl group having from 5 to 8 carbon atoms; X is selected from -O-(CH 2 ) q -O-; -(OCH 2 -CH 2 ) q -O-; -O-(CH 2 ) q -S-(CH 2 ) q -O;-NH-(CH 2 ) q -NH-; -NH-NH-, with q is an integer from 1 to 12, or a group and p is zero or an integer from 1 to 6; R x and R y are independently of one another selected from hydrogen, halogen or an alkyl group having from 1 to 10 carbon atoms; R z is selected from hydrogen or an alkyl group having from 1 to 10 carbon atoms; R w is selected from a hydroxy group, an alkoxy group having from 1 to 18 carbon atoms, a phenyl alkoxy group having from 1 to 4 alkyl carbon atoms, a cycloalkoxy group having from 5 to 8 carbon atoms, or a group of formula (III)c in which Z 1 and Z 2 are independently of one another selected from hydrogen, an alkyl group having from 1 to 18 carbon atoms, a phenyl group and a cycloalkyl group having from 5 to 8 carbon atoms; X is selected from -O-(CH 2 ) q -O-; -(OCH 2 -CH 2 ) q -O-; -O-(CH 2 ) q -S-(CH 2 ) q -O;-NH-(CH 2 ) q -NH-; -NH-NH-, with q is an integer from 1 to 12, or a group and p is zero or an integer from 1 to 6; (D) optionally at least one diluent as component D, and (E) optionally at least one further additive as component E. <EOS>