Ifilimu yefasitela, uma ifakwe kumafasitela, inciphisa ukudluliswa kokushisa ngokunciphisa ukuqhutshwa kokushisa kwengilazi. Kuyasiza ukuvimba ukushisa ukuthi kungagelezi ukusuka ohlangothini olufudumele kuya ohlangothini olupholile, kunikeze ukugqumisa ebusika kanye nokunciphisa ukushisa ehlobo. Ukwengeza, ngemva kokufakwa, ifilimu yefasitela ingavimba ngaphezu kuka-95% wemisebe ye-ultraviolet (UV), esiza ukuvikela impilo yesikhumba sabahleziyo, ivimbele ukufiphala kwempahla yangaphakathi nephansi ngenxa yokuchayeka elangeni,