BDS40 MK9 Fire Suppression Aerosol: How to Use

By Blaze Defense Systems | Tactical Gear: Breaching Tools, QR Kits, Medical, Fire Suppression | Published: 2026-10-29

Category: How-to Guides

Learn what the BDS40 FireBull MK9 finger-loop aerosol is and how to deploy it for rapid tactical fire suppression.

Quick answer

The BDS40 FireBull MK9 is a compact, non-toxic aerosol fire extinguisher with a finger-loop design for rapid one-handed deployment in tactical situations.

Why the finger-loop design matters

The finger loop and orange pull tab let you grab and activate the aerosol without fumbling, even under stress or while wearing gloves. This is especially useful when you need to suppress a spot fire quickly and keep your other hand free.

When to use this aerosol vs. a traditional extinguisher

The BDS40 MK9 is not a replacement for a full-size fire extinguisher. It is best for spot fires, small ignition sources, or as a backup in a breaching kit. The non-toxic, non-corrosive agent cools surfaces as it suppresses flames, making it safe for use around people and sensitive gear.

How to deploy the BDS40 MK9 aerosol

1. Remove from storage and grip the finger loop: Pull the aerosol from your pouch or case. Insert your index or middle finger through the finger loop and wrap your hand around the canister. The orange pull tab should be facing away from your palm. Common mistake: grabbing the canister by the body instead of the loop, which slows deployment.
2. Aim the nozzle at the base of the fire: Point the nozzle directly at the base of the flames, not at the top. Keep your face and body clear of the discharge path. Checkpoint: ensure you have a clear line of sight to the ignition source before pulling the tab.
3. Pull the orange tab and discharge: Firmly pull the orange tab with your free hand or by hooking it on a gear edge. The aerosol will release a steady stream of suppressant. Sweep side to side until the flames are out. Common mistake: pulling the tab prematurely while still aiming away from the fire, wasting agent.
4. Confirm extinguishment and ventilate: After the flames are out, move away from the area. If indoors, ventilate the space before re-entering. The non-toxic agent is safe, but any fire produces smoke and debris. Checkpoint: do not assume the fire is out—watch for re-ignition and have backup suppression ready.

Product facts

BDS40 Fire Suppression Aerosol MK9 Finger Loop (Case of 20): The BDS40 FireBull MK9 Finger Loop Case of 20 Aerosols uses a non-toxic, non-corrosive agent that rapidly suppresses flames while cooling surfaces. You can deploy it in confined spaces or near electronics without worrying about toxic residue or corrosive damage.
BDS40 Fire Suppression Aerosol MK9 Finger Loop (Case of 20)