... and s (FireWall A ,B) Class A , B Foam Extinguishing Agent Our (FireWall A,B) Class A , B foam extinguishing agents extinguish fires ... the standards and expectations of biodegradability. The Class A , B foam extinguishing agentss micro bubble consistency and its special surfactant ... ...0.7%~1.0% Packaging, Transportation and Storage Requirements · Package and transport in 25kg 50 kg , and 200 kg plastic ...