DEMİRKOL SIZDIRMAZLIK ELEMANLARI started its business life in 1961 by manufacturing asbestos yarn and packing seals. In 1982, DEMİRKOL SIZDIRMAZLIK ELEMANLARI opened its sales center in Galata Hardware Bazaar in Karaköy. In addition to diversified knitted packing seals, it started to process PTFE (teflon) in 1984. With the increase in mechanical seal applications in Turkey due to the development of sealing technology in the World; Demirkol, which started to manufacture mechanical seals and rotary unions (water, steam, thermal oil and air/gas rotary joints) in 1988, became the first manufacturer in Turkey in this field.