To treat or dress with sulphur; to vulcanize (rubber).

transitive. To subject (rubber or similar polymers) to the process of vulcanization; to harden or toughen by vulcanization. Also in extended use and…

transitive. = vulcanize, v. 2a.

transitive. To vulcanize (rubber); also, to harden (plastic) or otherwise improve physical properties during manufacture by chemical treatment.

transitive. To cure (rubber) with sulphur and heat; to vulcanize. Obsolete.

To vulcanize (india-rubber) by mixing it with sulphur or metallic sulphides and heating it.