Airport Specification for Firefighting Foam

Product: 6% Aqueous Film Forming Foam
Application: Extinguishment of hydrocarbon flammable liquid fires and securement of hydrocarbon flammable liquid spills for use at 6% concentrate.
The product must meet or exceed U.S. Military Specification, MIL-F-244385F with latest amendments, and must appear on the U.S. Military Qualified Products List (QPL-24385-28).

The manufacturers test or qualification reference number must be listed here____________.

The product shelf life must be 25 years minimum when stored in sealed, original containers.

The Product must be listed by Underwriters Laboratory, Inc.:

  1. As an aqueous film forming foam (AFFF) for application to hydrocarbon products.
  2. Hydrocarbon maximum application density of 0.10 GPM/Ft2 for hand line foam nozzle (Type III)
  3. For proportioning through an in-line eductor.

The concentrate must have the following properties:
Viscosity @ 77 degrees F:
pH @ 77 degrees F:
Use temperature:
10 CS maximum
7.5 -8.5
35 degrees F to 120 degrees F

The 6% solution must have the following properties:
Surface tension @ 72 degrees F:
Interfacial tension @ 72 degrees F:
17.0 Dynes/CM maximum
5.0 Dynes/CM maximum

Foam expansion
Fresh water:
Salt water:
6.0 CC/GM minimum
6.0 CC/GM minimum

25% Drain time @ 72 degrees F
Fresh water:
salt water:
Film sealability
150 seconds minimum
150 seconds minimum
No sustained ignition


50 square foot fire test, fresh and salt water:
320% minimum, 40 seconds summation
360 seconds minimum, 25%burnback
50 seconds maximum extinguishment