What is the term for a mixture of water and foam concentrate before air is introduced?

The term for a mixture of water and foam concentrate before air is introduced is a foam solution. A foam solution is created by combining water with a specific type of foam concentrate, which is a chemical mixture designed to reduce surface tension, allowing for the formation of foam when air is introduced. This foam can effectively smother fires by displacing oxygen and forming a barrier against the heat.

Foam, as a separate term, refers to the final product that includes air and is used for firefighting, while foam concentrate specifically denotes the chemical product that must be mixed with water to create the foam solution. Fire suppressant is a broader term that encompasses various agents used to extinguish fires, including foams, but does not specifically refer to the mixture of water and foam concentrate.