The prepared n-fatty alcohols from petroleum sources are esterified with a dibasic acid series (malonic, succinic, glutaric and adipic) or phthalic anhydride, giving the corresponding C-12 fatty esters. The prepared C-12 fatty esters were formulated with natural rubber. The drying time, some mechanical properties and fungitoxicity of the prepared film samples were examined. The conventional dibutyl phthalate plasticizer was used for the purpose of comparison. The data obtained indicate that the prepared fatty esters can be used as plasticizers with antifungal activity for natural rubber.