Babban rawar lantarki insulators shine don samar da gyare-gyaren injiniya da kuma wutar lantarki don kayan lantarki da masu gudanarwa a cikin watsa wutar lantarki da layin samar da wutar lantarki. A halin yanzu ana samun insulators a cikin manyan kayan aiki guda uku, wato yumbu, gilashin zafi, da kayan haɗin gwiwar kwayoyin halitta. Insulators sun taka muhimmiyar rawa wajen bunkasa masana'antar wutar lantarki.
