In this paper a new stabilization method applied to ethylene-propylene-diene monomer (EPDM) against oxidation is presented. The doped lead titanate (PbTiO3) with several atoms (Ce, Pr, In, Gd and Nb) is a typical example of protection effect of inorganic filler. The isothermal and nonisothermal (CL) procedures were used for monitoring the progresses and the protection degrees of oxidation. The most evident effect was promoted when the filler was doped with gadolinium and dysprosium. The contribution of doped filler as the delay activities in material oxidation is described by the activation energies required for thermal ageing of modified polymer. They were calculated based on temporal kinetic parameters (oxidation induction time, half period of oxidation and maximum oxidation time). The highest stabilization efficiencies were found for the sample containing 5 and 10 phr of inorganic phase. The replacement of organic synthesis antioxidants by doped compounds demonstrates that the choice of inorganic structures may become a usual praxis for the extension of product life time operating in several hazardous circumstances: nuclear engineering, space applications, electrical equipments, where the degradation occurs in a large extent.