Perimeter Solutions, Inc. engages in the provision of global solutions for fire safety and specialty products industries. It operates through the Fire Safety and Specialty Products segments. The Fire Safety segment specializes in the formulation, manufacture, and sale of fire retardants and firefighting foams that assist in combating various types of fires, including wildland, structural, flammable liquids, and others. It also offers specialized equipment and services, which include airbase retardant storage, mixing, and delivery equipment, mobile retardant bases, retardant ground application units, mobile foam equipment, and others The Specialty Products segment produces and sells phosphorus pentasulfide (P2S5), primarily used in the preparation of lubricant additives, including a family of compounds called zinc dialkyldithiophosphates (ZDDP) that provide critical anti-wear protection to engine components. The company was founded in 2018 and is headquartered in Clayton, MO.