Verb
To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization.
Source: Webster's dictionaryvulcanized rubber Source: Internet
vulcanize rubber Source: Internet
Sulfur, by itself, is a slow vulcanizing agent and does not vulcanize synthetic polyolefins. Source: Internet
Sulfur is also mixed into rubber to vulcanize it. Source: Internet