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How to Clean Up Fire Extinguisher Residue

Did you recently use a fire extinguisher to quench a small fire in your Michigan business? You’re probably relieved to have the incident behind you, but before you can return to business as usual, you must clean up the fire extinguisher residue.

The recommended cleaning methods depend on the type of extinguisher you used. Follow this guide to get your building back to normal.

Clean Up Dry Chemical Fire Extinguisher Residue

fire extinguisher services

Dry chemical fire extinguishers use firefighting agents such as monoammonium phosphate, sodium bicarbonate, and potassium bicarbonate. These leave behind a corrosive powder, so it’s important to clean up dry chemical fire extinguisher residue quickly, especially if it has come in contact with metal surfaces.

  • Vacuum or sweep up loose debris.
  • Spray stuck-on residue with isopropyl alcohol diluted 50 percent with warm water. Let the solution sit for several minutes, and then wipe with a damp rag.
  • To neutralize sodium bicarbonate and potassium bicarbonate residue, apply a solution of 98 percent hot water and 2 percent vinegar. After several minutes, wipe the area with a damp rag.
  • To neutralize monoammonium phosphate residue, apply a baking soda and hot water paste. After several minutes, wipe the area with a damp rag.
  • Give the affected area a final wash with soap and water, and then rinse clean. Use fans to help the spot dry quickly.
  • If dishes, cookware, or clothing have dry chemical fire extinguisher residue on them, wash as usual in the dishwasher or washing machine.

Clean Up Class K Wet Chemical Fire Extinguisher Residue

Because of the corrosive nature of dry chemicals, Class K wet chemical extinguishers are recommended for commercial kitchens. When cooking oil and grease catch on fire, a potassium acetate-based, low-pH Class K extinguisher discharges a fine mist to cool cooking surfaces and extinguish the flames. Before you start cooking again, you need to clean up the residue.

  • To prep the area, shut off power to all cooking equipment and put on rubber gloves.
  • Wipe away foamy residue with a sponge or cloth dipped in hot, soapy water.
  • Rinse all surfaces that came in contact with wet chemicals and allow everything to dry completely before turning the power back on.

Clean Up Halotron Fire Extinguisher Residue

Some older fire extinguishers use Halon as the primary extinguishing agent. While these are no longer in production, you may still have a Halotron fire extinguisher that you recently used to douse a blaze. While Halon leaves behind no visible residue, it’s still important to clean areas that came in contact with this extinguishing agent to remove smoky smells from the fire and neutralize the surface.

  • Apply diluted degreaser to the affected area. Use a sponge for small spots or a spray bottle for larger surface areas.
  • Apply a neutral cleaner to remove any remaining residue.
  • Wipe away all cleaning products and allow the surface to dry.

No Cleanup Needed for Clean Agent Fire Extinguishers

Clean agent extinguishers are non-conductive and non-ozone depleting, making them ideal for putting out fires near computers and electronics that could be damaged by water or corrosive dry chemicals. Clean agent extinguishers are effective against Class A, B, and C fires.

Because clean agents dissipate harmlessly into the atmosphere, they leave no residue behind and require no cleanup.

Fire Protection Services in Michigan

If your business requires fire extinguisher services or beyond, Fire Pros is here for you. contact us now to schedule services in Michigan.

Category: Fire Extinguishers

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George was prompt, did a thorough Inspection, and gave us a very entertaining training on the system. Additionally he was very patient, kind, polite and kept us laughing. We learned valuable information for our team trainings. Also important to us as an assisted living is that we would feel very comfortable with George being in our resident’s home once we open. There are many places that will “check the box” for the twice yearly inspections, but this was so much more valuable that just the usual required paperwork. We highly recommend! Thank you George!


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Mark S.

Mark S.

Near Seeley Rd, Novi, MI 48375
Robert G.

Robert G.

Near Secor Rd, Toledo, OH 43606
Robert G.

Robert G.

Near Smith Rd, Fowlerville, MI 48836
Brandon  F.

Brandon F.

Completed fire extinguisher and emergency light inspections.

Near 76th St SW, Byron Center, MI 49315
Robert G.

Robert G.

Near Cogswell St, Romulus, MI 48174
William S.

William S.

Sprinkler Service Call

Near S 11th St, Kalamazoo, MI 49009
Tyler H.

Tyler H.

Annual Fire Alarm System Inspection

Near Cherrywood Ln, Ann Arbor, MI 48103
John  R.

John R.

Near Meadow Hills Ln, Fremont, MI 49412
Tyler H.

Tyler H.

Annual Fire Alarm System Inspection

Near Cherrywood Ln, Ann Arbor, MI 48103
William S.

William S.

Near Heatherdowns Ln, Kalamazoo, MI 49048
Terrence  J.

Terrence J.

9/29/22 PS10 is in the shop in Novi and the PS40 is at Galloup / Please split up so that we are not late for Grandmount Gardens they have notified tenants that we are coming. Thanks DH Sprinkler Service Call Service to install new PS-10 & PS-40 Switches to complete installation of alarm system Deficiency: Low air pressure switch was not programmed when it was installed and the connected alarm wiring is now backwards. Need to disconnect the 120 volt wiring for horn and bell outside and also alarm wiring, lower pressure to system and set switch to activate at desired pressure, then connect back the alarm wiring and 120 if desired.

Near Mound Rd, Shelby Township, MI 48316
Tyler H.

Tyler H.

Mag lock to courtyard is going bad and needs to be replaced. 12 volt wire is un-hooked. When the power is applied to the magnet the sounder will go off and the mag will lock, but the sounder will not shut off. Customer would like a new ,at lock. - repair

Near Ann Arbor-Saline Rd, Ann Arbor, MI 48103
Brandon  F.

Brandon F.

Completed monthly fire extinguisher inspection

Near 76th St SW, Byron Center, MI 49315
Brandon  F.

Brandon F.

Completed monthly fire extinguisher inspection

Near 76th St SW, Byron Center, MI 49315
John  R.

John R.

Near Springview Dr, Battle Creek, MI 49037
Mark S.

Mark S.

Near Farmington Rd, Livonia, MI 48150
Sean W.

Sean W.

Near Monroe Ave NW, Grand Rapids, MI 49503
William S.

William S.

Sprinkler Inspection

Near Mall Dr, Portage, MI 49024
David H.

David H.

Near Telegraph Rd, Southfield, MI 48033
David H.

David H.

Near Lahser Rd, Southfield, MI 48033
Sean W.

Sean W.

Near Marcell Dr NE, Rockford, MI 49341
David H.

David H.

Near E 10 Mile Rd, Center Line, MI 48015
David H.

David H.

Near 24th Ave, Fort Gratiot Township, MI 48059
Jared J.

Jared J.

100' Rack Fire Hose Test and Inspection

Near Parkview Blvd, Warren, MI 48092
Robert G.

Robert G.

Near Southfield Rd, Detroit, MI 48223