When applied to solid fuels, what does Class A foam do after it blankets the fuel?

Class A foam is specifically designed for use on solid fuels such as wood, paper, and fabric. Once the foam is applied and blankets the solid fuel, it serves multiple purposes to effectively suppress the fire. One of its key functions is to break down over time and release water. This water is crucial because it directly cools the fuel and reduces the temperature, which is essential for extinguishing the fire.

In addition to cooling, the foam also enhances the wetting properties of the water, allowing it to penetrate solid fuels more effectively, which helps to control and reduce the intensity of the fire. This combination of cooling and improved wetting makes Class A foam an effective firefighting tool for solid fuel fires. By releasing water as it breaks down, it helps to manage the heat and mitigate the risk of reignition, providing a more efficient means of extinguishment compared to plain water alone.