ORION CHIMFEX CHIMNEY FIRE EXTINGUISHER This fire suppressant is indispensable as the first line of defense for controlling fires that occur from creosote build-up in chimneys. Independent test results show it suppresses a chimney fire in an average of 22 SECONDS! A homeowner or professional fire fighter can use Chimfex as a safe, fast, and easy-to-use tool to combat a chimney fire with no water damage. Similar to a flare, you strike the end to light it, toss it in the wood stove or down the chimney and it extinguishes the fire by using up the oxygen. They are only good for one use. It is recommended to keep 2-3 on hand since many times chimney fires can re-ignite. Use in wood stoves, fireplaces, or fireplace inserts.