CHEMGUARD Class A foam concentrates combine foaming and wetting agents for use in a variety of firefighting applications. When proportioned with water, Class A concentrates reduce the solution surface tension and allow greater penetration of the foam into most Class A fuels. CHEMGUARD Class A foams cling to surfaces such as charred wood with minimal run off, enhancing fire suppression and reducing water usage. CHEMGUARD Class A concentrates are effective in fighting many deep-seated Class A fires, such as paper, tires, wooden residences and structures, and wildland. They are suitable for ground and air attack, creating firebreaks, use with compressed-air foam systems (CAFS), and mop-up operations.