Isikrini sesihlaba sesandongwana Tonda sishicilela ngamabhenethi we-polyurethane abangaphansi ukusuka amanqaku aphoqele kuhluhlwa umoya wesintu, asibonakaleyo umoya wawunxashe kunye nokuthuthukiswa komfanekiso. Amabhenethi angamandla yezililo ezinene (1–5 mm) ngaphandle kokusuka, ukuze izintathu ezincane zisemize ngenxa yokuba umoya uvumele. Inani leshesha lesikhombisa lwe-polyurethane (0.3–0.5) lisenzela ukuthi imifanekiso afulekise, ngokushesha lokhu liphatha kakhulu, ngokuphinda ukubonisa ukuthi lusetyenziswa ngokuphi indawo ezingaphansi kumoya omncane okanye emiswe. Lishicilela ngokuphi indawo elandelwayo lokusebenzela isandla sombili okanye lokulayisha amagumbi, lokuncane ukufakelwa kwesikrini sokuthi sihambisana nokuhlola amaxhobo akho ekusetshenziswa ngokuthi usenziwe ngendlela yesedimentation.