Hydroxyethyl methyl cellulose(HEMC) o se vai-soluble polymer e masani ona faʻaaogaina e avea o se mafiafia, gelling agent, ma faʻapipiʻi. E maua e ala i le fa'a'ona o le methyl cellulose ma le vinyl chloride alcohol. O le HEMC e lelei le solubility ma le tafe, ma e masani ona faʻaaogaina i fanua e pei o faʻapipiʻi vai, mea fau fale, ie, mea tau tausiga a le tagata lava ia, ma meaʻai.
I totonu o le faʻaogaina o vai, e mafai e le HEMC ona faia se sao i le mafiafia ma le viscosity pulea, faʻaleleia le tafe ma le faʻaogaina o le faʻaogaina o le faʻapipiʻiina, faʻafaigofie ona faʻaoga ma faʻaoga. I mea faufale,MHEC mafiafiae masani ona faʻaaogaina i oloa e pei o sima faʻafefiloi mago, sima sima,fa'apipi'i i'a sima, ma isi. E mafai ona faʻateleina lona faʻapipiʻi, faʻaleleia le tafe, ma faʻaleleia le vai faʻafefe ma le tumau o mea.