PHOS-CHEK WD881 Class A Foam Concentrate

PHOS-CHEK WD881 Class A Foam Concentrate

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, allowing firefighters 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 firefighter 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 products available today. Other products contain significant amounts of added water in the concentrate. This extra water means higher use rates will be required to achieve expected results.

Qualifications and Uses
PHOS-CHEK WD881 is fully tested and qualified for use by the USDA Forest Service under Specification 5100-307b for all application methods including ground engines, Canadair water scooper aircraft, single engine air tankers (SEATS), and fixed-tank helicopters. PHOS-CHEK WD881 is compatible with fresh water, seawater, and long-term retardant. Foam characteristics are not affected by freeze-thaw.

PHOS-CHEK WD881 is a UL-listed wetting agent at 0.1% use rate for Class A fires; 0.25% use rate for Class B fires; contains NO HAZARDOUS INGREDIENTS, is readily biodegradable, and has no flash point, making it safe to use near open flames. PHOS-CHEK WD881 meets the requirements of NFPA 1150 and has superior performance for use in CAF systems.

Use Rates

• Wetting Agent: 0.1%
• Direct Attack: 0.3% to 0.5%
• Mop Up/Overhaul: 0.1% to 0.3%
• Exposure Protection: 1.0%
• Brush (Pre-Treatment): 0.7% to 1.0%

Handling Precautions
PHOS-CHEK WD881 concentrate is moderately irritating to eyes and slightly irritating to skin. Prolonged or repeated contact with concentrate may produce skin irritation and inhalation of mists can irritate the nose and upper respiratory system.

Eye Protection: Goggles are recommended when handling concentrate. If in the eyes, flush immediately with plenty of water for at least 15 seconds.

Skin Protection: Wear protective clothing and chemical resistant gloves when handling concentrate. Exposed skin should be washed as soon as possible.

Respiratory Protection: None required. Avoid breathing mist or vapor.

Other precautions: Keep container closed. Use with adequate ventilation.

These precautions and practices are similar to those used with any heavy-duty detergent.

Water solutions of PHOS-CHEK WD881 at use levels (0.1%–1.0%) are only minimally irritating, but should be washed from skin as soon as practical, as dying and chapping could result from prolonged exposure.