How to Clean Fire Extinguisher Residue

What are the Components of Fire Extinguisher Residue?

According to CHEMGUARD, fire extinguisher foam is made of water, foam concentrate, and air. It is considered a stable group of small air-filled bubbles with a lower density than oil, gas, and water; when the ingredients are mixed, they create the homogeneous foam we’re familiar with, that blankets spaces when aerated and discharged.

Tips for Cleaning Fire Extinguisher Residue

Fire Systems, Inc. outlines useful steps for cleaning fire extinguisher residue . Keep in mind there are different kinds of fire extinguishers . As you’ll see below, the type of fire extinguisher used will dictate how to approach the cleanup process.

Remember, it is important to don a dust mask, goggles, and gloves before cleaning any fire extinguisher residue, as it may be hazardous.

For dry chemical extinguishers that put out class A, B, and/or C fires:

1. Vacuum or sweep up as much of the residue as possible.
2. Mix a solution of 50% warm water and 50% isopropyl alcohol, then spray the mixture to break up any leftover silicone. Allow the solution to settle for approximately five minutes, then rinse with warm water.
3. Treating sodium bicarbonate and potassium bicarbonate based dry chemicals is handled a bit differently. First, mix 2% vinegar and 98% hot water, then wash the affected area. Allow the solution to settle for approximately five minutes, then rinse with warm water.
4. Treating monoammonium phosphate solution requires a slightly different process as well. First, mix baking soda and hot water. Allow the solution to settle for approximately five minutes, then rinse with warm water.
5. Using soap and water, wash and rinse the affected area(s).
6. Lastly, use a fan to spot dry any remaining wet areas.

For wet chemical extinguishers that put out class K fires:

1. Turn off all fuel sources that may be connected to cooking equipment.
2. Using hot water and soap, scrub the residue away with a sponge or cloth.
3. Rinse affected areas and surfaces.
4. Lastly, let the area fully dry before you turn back on the equipment.

For dry powder extinguishers that put out class D fires:

1. Use a vacuum or brush to clean up the residue.
2. Sweep all the collected residue into a trash bag or other method of containment, then properly dispose of it in a trash can.
3. Lastly, use a damp cloth to wipe off any lingering powder from affected surfaces.

1. Immediate board-up and roof tarping service if necessary, to prevent further damage.
2. Water removal and drying (if water damage is present). Water removal begins as soon as possible; dehumidifiers and air movers are used to expedite the process and help ensure the affected space is properly dried.
3. Removal of smoke and soot from all surfaces. Using specialized techniques, ceilings, floors, and walls are cleaned of soot and smoke.
4. Restoration. The last step involves returning the space to pre-fire condition. This may include minor repairs, such as painting or new carpet installation, or major reconstruction of certain areas.

For more information, please visit our FAQ and Glossary .

Sources:

https://www.chemguard.com/about-us/documents-library/foam-info/general.htm

https://firesystems.net/2018/09/14/how-to-clean-up-fire-extinguisher-residue/