Izinto ezivelisa ugwebu zerabha ekrwada zibandakanya irabha ekrwada yerabha, i-agent egwebu, i-vulcanizing agents, i-reinforce agents kunye nezinye izongezo (ezifana ne-flame retardants, i-colorants, i-lubricant, i-ejenti yokukhulula ukungunda, njl.).
Imathiriyeli ekrwada yerabha enogwebu ekrwada yirabha eyomeleleyo ye-silicone, ngelixa yona irabha ebunjiweyo enogwebu yirabha elulwelo lwe-silicone. Le yokugqibela isabela ngokucokisekileyo ngakumbi kunye namaqamza afanayo.
Zonke ii-agent ezikhupha ugwebu ziikhemikhali ezikhupha ugwebu. Kwiqondo lokushisa elithile, bayabola ukuvelisa igesi, ebangela ukuba i-silicone ikhulise kwaye yenze amaqamza, okwenza i-silicone ibe neempawu zokuxinana okuphantsi, ukuthambisa kunye nokufaneleka.
I-agent ebangela ukuba irabha ekrwada iqhube-i-reactions zekhonkco, yenze uthungelwano olune-dimensional ezintathu{1}ulwakhiwo, olunika irabha yesilicone amandla athile kunye nokunwebeka. Ii-agent zokuqinisa zisetyenziselwa ukunyusa amandla kunye nokunxiba ukuxhathisa kwe-silicone.