Which type of foam uses protein concentrate as a main component?

Protein foam is characterized by its use of protein concentrate as a primary component. This type of foam is specifically formulated by using hydrolyzed proteins derived from animal or plant sources. The unique properties of protein foam make it especially effective in combating flammable liquid fires, as it creates a thick blanket over the burning material, suppressing vapors and preventing re-ignition.

The effectiveness of protein foam in fire suppression is due to its ability to form a continuous film when deployed, which protects against heat and helps smother the flames. Its composition enhances the foam's stability and resilience, allowing it to adhere better to surfaces, even in the presence of flammable liquids.

By understanding that protein foam is distinct in its formulation and effectiveness, it becomes clear why this answer is the correct choice when identifying the type of foam that primarily utilizes protein concentrate.