Antiozonant wax (protective wax)

Antiozonant waxes migrate to the surface and form a thin film that keeps ozone away from the rubber under static conditions. Which wax to choose depends on the part's service temperature range: the ratio of paraffinic to microcrystalline fractions determines at what temperature the film forms. In dynamically loaded parts wax alone is not enough; it is combined with a PPD antiozonant.