PHOS-CHEK® WD881 Class A Foam concentrate is specially formulated to make water more effective for firefighting. The unique combination of surfactants in PHOS-CHEK WD881 significantly reduces water’s surface tension and, when mixed with air, creates a superior foam blanket that surrounds fuels with a thick layer of water. This creates a barrier between the fuel and the fire, knocking down the fire faster than water alone, and allowing fire fighters to see the areas of application. Making the water more effective reduces the amount of water needed to extinguish the fire, reduces water damage and increases fire fighter safety through quicker knockdown and reduced mop-up/overhaul requirements.

PHOS-CHEK WD881 is highly effective for fighting Class A fires when mixed with water at use rates of 0.1% to 1.0%. It has proven effectiveness in many applications including Compressed Air Foam Systems (CAFS), structural firefighting, forest fire suppression and prescribed burning, mine fires, industrial Class A fires, and for extinguishing hydrocarbon spill fires.

PHOS-CHEK WD881 is one of the most concentrated Class A foam product available today. Other products contain significantly more water in the concentrate. This extra water means higher use rates will be required to achieve expected results.

PHOS-CHEK WD881 does not contain any intentionally added PFAS chemicals (including PFOS & PFOA).

Please consult with your regulatory expert to understand the restrictions and regulations that may be applicable to your state or locality with regards to the sale and distribution of Class A foam concentrates.

Class B foams should not be used on Class A fires. Never mix Class A and Class B foam concentrates.