Abstract: A method and an apparatus for vulcanization of rubber and rubberized materials in which a strip of material to be vulcanized is continuously transported from one autoclave to a second autoclave and thence to a third autoclave. Material is unrolled from a roll in the first autoclave, passed into and along a plurality of back and forth paths in the second autoclave and thence into the third autoclave where the strip is rolled. In all three autoclaves overpressure is maintained, and the second autoclave is the only one where vulcanization temperature is maintained. Closed strip communication channels are provided between the first and second and the second and third autoclaves. The channels are cooled to avoid passage of the high vulcanization temperatures from the second autoclave to the other autoclaves.