C-130E Hercules equipped with a Modular Airborne FireFighting System makes a Phos-Chek fire retardant drop in Southern California in October 2003. Phos-Chek is a brand of long-term [1] fire retardants, class A foams, and gels manufactured by Perimeter Solutions, headquartered in Clayton, Missouri, United States. [2] [3]

The content for the PHOS-CHEK website has been consolidated and moved to a new, single website: www.perimeter-solutions.com. The new Perimeter Solutions website offers information on our global offerings.

6 days ago · PHOS-CHEK® is a non-colored long-lasting fire retardant. The US Forest Service has used PHOS-CHEK to stop the spread of wildfires for 60 years.

Jan 11, 2025 · Phos-Chek’s maker says the reaction between the retardant and cellulose consumes heat energy from the approaching fire and produces non-flammable carbon material. The goal is to slow or stop the fire’s spread, especially if the …

6 days ago · Perimeter Solutions’ PHOS-CHEK ® Ground-Applied Long-Term Retardants are a valuable fire management tool that can help stop wildfire in its tracks. Our retardant allows for precise, cost-effective placement and can be applied well in advance of fire conditions.

Mar 25, 2025 · PHOS-CHEK ® FORTIFY ® is an award-winning fire retardant technology that delivers a proactive and preventive wildfire management solution. Public utilities, state and federal agencies and commercial and industrial facilities can protect against wildfire throughout the peak fire season with a single annual treatment of PHOS-CHEK FORTIFY at the ...

Phos-Chek LC-95-W is a wet concentrate formulation that uses ammonium polyphosphate (APP, 11-37-0) as the fire retardant salt. Phos-Chek LC-95-W contains a gum thickener to provide a low viscosity product.

Phos-Chek chemicals are tailored with respect to concentration (re-tardant salt) and consistency for specific missions and vehicles. New grades are continually under development to satisfy the requirements being defined for new application vehicles and systems. Two grades, Phos-Chek®XA and Phos-Chek®259 are currently operational.

May 1, 2018 · PHOS-CHEK® and FIRE-TROL® brand long-term fire retardants, Class A foams, and water-enhancing gels are the world’s leading chemical solutions for managing wildland, industrial and municipal fires. Established in 1963, the PHOS-CHEK name is synonymous with quality, innovation and partnership.

Phos-Chek Long Term Fire Retardant, is a colorless long-term fire retardant, is easily applied using any garden or agricultural sprayer. Once properly applied, Phos-Chek will help protect your property long before a wildfire begins.