Rọba silikoni vulcanized iwọn otutu-, ti a kukuru bi HTV, ni a tun mọ si ooru{1}}roba silikoni vulcanized tabi rọba silikoni to lagbara. Polima ipilẹ rẹ ga -molecular{4}}iwuwo polysiloxane laini iwuwo (nigbagbogbo polydimethylsiloxane), pẹlu iwuwo molikula kan deede lati 400,000 si 800,000.
Ni ipo rọba aise rẹ, o maa farahan bi ologbele-sihin tabi funfun dira (gẹgẹbi agbo rọba, ṣiṣan rọba aise, bulọọki rọba, ati bẹbẹ lọ) o si ni pilasitik giga.
Vulcanization (curing) gbọdọ ṣee ṣe ni iwọn otutu ti o ga julọ (ni deede laarin iwọn 110 ati iwọn 180, tabi paapaa ga julọ), nilo ohun elo titẹ ati akoko vulcanization kan (ti o wa lati iṣẹju diẹ si iṣẹju mẹwa). Ilana yii ni a maa n ṣe ni awọn ohun elo gẹgẹbi igbẹ, extrusion ati calendering.