mcr S.A., listed on the Warsaw Stock Exchange and trading as Mercor SA until its recent rebrand, has manufactured passive fire protection in Gdańsk since 1988. ITB’s national register lists it as holder of ITB-KOT-2018/0560 for mcr Silboard kits protecting carbon-fibre-strengthened reinforced concrete, ITB-KOT-2018/0561 for mcr Silboard cable and service ducts, ITB-KOT-2021/1717 for mcr ISOVERM 825 protecting concrete against the RWS tunnel and modified hydrocarbon curves, ITB-KOT-2021/1800 for the mcr TECWOOL F spray mortar, and ITB-KOT-2023/2515 for a structural fireproofing kit. Its ranges cover board systems, sprays, intumescent coatings and penetration seals. The group’s smoke-ventilation business trades separately as Mercor Light&Vent, and its Spanish and Hungarian subsidiaries operate under their own names.