Chemical Extinguisher Arrow

The Chemical Extinguisher Arrow is a very useful non-assault trick. Heroes are always stumbling on fires and it’s best to be prepared. The arrow contains a high-expansion foam that covers a tremendous area when exposed to air. The foam cools the fire and coats the fuel, preventing its contact with oxygen, which results in suppression of the combustion. Usually the foam is released upon impact, but it can be triggered manually to create a larger spread.

The arrow is designed to fight fires from a safe distance, not for use as a weapon at all. And yet, there are those times when it can really come in handy against a foe.


  • Type: Utility Arrow
  • Frequency: Common
  • Effects: Contains a fire suppression foam that spreads over a large area upon impact.
  • Variations: Extinguisher Arrow, Fire Extinguisher Arrow, Foam Arrow
  • First Appearance: World’s Finest #91 (1957)


Reality Check

For years, foam has been used as a fire-extinguishing medium for flammable and combustible liquids. Unlike other extinguishing agents (water, dry chemical, CO2, etc.) a stable aqueous foam can extinguish a flammable or combustible liquid fire by the combined mechanisms of cooling, separating the flame/ignition source from the product surface, suppressing vapors and smothering.

Water, if used on a standard hydrocarbon fuel, is heavier than most of those liquids and if applied directly to the fuel surface, will sink to the bottom having little or no effect. If the liquid fuel heats above 212ºF, the water may boil throwing the fuel out of the contained area and spreading the fire. For this reason, foam is the primary fire-extinguishing agent for all potential hazards or areas where flammable liquids are transported, stored, or used as an energy source.