I-sealer yebhokisi eqhutshwa ngakwesobunxele nakwesokudla + phezulu naphansi isebenzisa i-sticky tape ukuvala ibhokisi, engaqedela izenzo zokuvala phezulu naphansi ngesikhathi esisodwa, futhi umphumela wokuvala ucocekile futhi muhle. Ngesikhathi esifanayo, ububanzi nokuphakama kungalungiswa ngokuzimela ngokuya ngobukhulu bebhokisi, futhi i-tape yokunyathelisa ingasetshenziswa futhi ukuthuthukisa isithombe somkhiqizo. Le sealer yebhokisi ilula futhi ifakwe ama-caster ajikelezayo okunyakaza okuguquguqukayo. Lo mshini wokuvala ibhokisi usetshenziswa kabanzi ezimbonini ezahlukene ekhaya nakwamanye amazwe njengokudla, imithi, amathoyizi, ugwayi, amakhemikhali ansuku zonke, izinto zikagesi nokunye.