mcr Spolka Akcyjna produces, sells, installs, and services passive fire protection systems in Poland. It provides active extinguishing includes water mist fire extinguishing; construction security includes panel systems, spray systems, installation penetration systems, intumescent coating systems, and sprayed acoustic plasters; building systems integration, industrial energy storage, and fire partitions. It serves industrial buildings, professional energy, server rooms, high-rise buildings, cultural heritage buildings, industry and energy, public buildings, and commercial and logistics facilities. The company was formerly known as Mercor S.A. and changed its name to mcr Spolka Akcyjna in December 2025. The company was founded in 1988 and is headquartered in Gdansk, Poland.