PHOS-CHEK® WD881A Class A Foam concentrate is specially formulated to make water more effective for fire fighting.

The unique combination of surfactants in WD881A 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 allow 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.

WD881A 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 WD881A is the most concentrated Class A foam product 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.

WD881A foam concentrate does not contain PFAS chemicals including, but not limited to, PFOS or PFOA. luorinated surfactants are used in Class B foam
concentrates and are necessary to form a film on flammable liquid fires. Class B foams should not be used on Class A fires. Never mix Class A and Class B foam
concentrates.

WD881A 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. WD881A is compatible with fresh water, sea-water and long-term
retardant. Foam characteristics are not affected by freeze-thaw.
WD881A contains NO HAZARDOUS INGREDIENTS, is readily biodegradable, and
has no flash point, making it safe to use near open flames. WD881A meets the
requirements of NFPA 1150 and has superior performance for use in CAF systems

• 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%

WD881A Class A foam concentrate does not contain
PFAS chemicals commonly found in fluorinated Class
B foam concentrates. Perimeter Solutions foam
manufacturing process is intentionally separated
between fluorinated and non-fluorinated concentrate
types, thus eliminating the potential for cross
contamination or residual contamination.

For detailed safety information, please refer to the SDS.

WD881A 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 of 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 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.
For complete SDS please request one via email to ensure you have the latest information.