EPDM O-ring wani nau'in hatimi ne da aka yi daga roba ethylene propylene diene monomer (EPDM).Yana da kyakkyawan juriya ga matsanancin zafin jiki, hasken UV, da sinadarai masu tsauri, yana sa ya dace da aikace-aikacen rufewa da yawa.Har ila yau, EPDM O-rings suna da kyawawan kaddarorin rufe wutar lantarki kuma suna da ɗan tsada-tasiri idan aka kwatanta da sauran elastomers.Ana yawan amfani da su a aikace-aikace kamar maganin ruwa, da hasken rana, da sarrafa abinci.EPDM O-zoben suna samuwa a cikin girma dabam dabam kuma ana iya keɓance su don biyan takamaiman buƙatun hatimi.