Properties of ten wax compositions recommended for rubber goods, especially for tyres were evaluated. Routine test methods and high temperature GC and DSC have been applied. A typical NR/SBR rubber compound and two tyre sidewall compounds were used. Ozone accelerated tests were carried out in an ozone chamber and a refrigerator equipped with an ozone generator at temperatures of 40 and 0 degrees C. The antiozonant effect of waxes was related to their chemical structure, e.g. carbon number distribution of normal and branched paraffins. The most effective wax compositions at high and low temperature were selected.