This article describes concerning to the effect of different processing routes on the tensile properties of natural rubber compounds containing ground ethylene propylene diene rubber (EPDM) waste. Two-stage processing was promoted and compared with the conventional processing. The proposed processing was done by mixing ground EPDM waste, a dispersion form of rubber additives and natural rubber latex (NRL) prior to compound with the remaining dry rubber on the two-roll mill. By applying such method, the cross-linking distribution was significantly improved, providing the superior state of cure, cross-link density and tensile properties.