Botlolo ea metsi e tletse metsi a khalase, a sebelisetsoang ho hloekisa fensetere ea koloi.Metsi a khalase ke a lisebelisoa tsa koloi.Metsi a fenstere ea koloi a boleng bo holimo haholo a entsoe ka metsi, joala, ethylene glycol, corrosion inhibitor le mefuta e fapaneng ea li-surfactants.Metsi a lifensetere tsa koloi a tsejoa ka hore ke metsi a khalase.