A na-akpọ plasta nke dabere na gypsum dị ka ngwa ngwa agwakọtara tupu oge eruo nke nwere gypsum dị ka ihe nkedo.Ejikọtara ya na mmiri na saịtị-ọrụ ma jiri ya mee ihe na mgbidi dị iche iche dị n'ime - brik, ihe, ihe mgbochi ALC wdg.
Hydroxy Propyl Methyl Cellulose (HPMC) bụ ihe mgbakwunye dị mkpa maka ịrụ ọrụ kacha mma na ngwa ọ bụla nke plasta gypsum.