Ngenjongo jikelele yocingo lwangaphakathi lwezixhobo zombane kunye nezombane, apho zibekwe kwi-oyile kwiqondo lobushushu elingagqithiyo kuma-60°C okanye kuma-80°C.Ubukhulu be-insulation bocingo obufanayo bokuqinisekisa ukuhluba kunye nokusika lula.Ukumelana ne-asidi, i-alkali, i-oyile, ukufuma kunye nefungi.