I-sunscreen kunye neefomyula ezisebenzayo zisengozini yokubola, nto leyo ebangela ukutshintsha kombala, ukwahlukana, okanye ukulahleka kokusebenza kwe-SPF. Ukupakisha kubalulekile ekukhuseleni iifomyula zezithambiso kunye nezamayeza kwizinto ezibangela uxinzelelo kwindalo ezifana neoksijini, ukufuma, kunye nokuvezwa yi-UV. Izakhiwo zeetyhubhu eziguquguqukayo ezinamalaya amahlanu zibonelela ngokhuseleko oluphezulu lwezithintelo, nto leyo ezenza ukuba zilungele iimveliso ezinobuthathaka ezifana ne-sunscreen, ii-paste zokhathalelo lomlomo, kunye nokhathalelo lolusu olusebenza kakuhle. I-EVOH (i-Ethylene Vinyl Alcohol) yongeza umaleko ophakathi okhusela ifomula yakho kulo lonke ixesha layo lokuphelelwa.