2019-6-27 · A fire blanket is a safety device designed to extinguish incipient (starting) fires.It consists of a sheet of a fire retardant material which is placed over a fire in order to smother it.. Small fire blankets, such as for use in kitchens and around the home are usually made of fiberglass and sometimes kevlar, and are folded into a quick-release contraption for ease of storage.