Isikrini selanga kanye namafomula asebenzayo asengozini yokukhishwa yi-oxidation, okubangela ukushintsha kombala, ukuhlukaniswa, noma ukulahlekelwa ukusebenza kahle kwe-SPF. Ukupakisha kubalulekile ukuze kuvikelwe ukwakheka kwezimonyo nemithi ngokumelene nezingcindezi zemvelo ezifana nomoya-mpilo, umswakama, nokuchayeka kwe-UV. Izakhiwo zeshubhu eziguquguqukayo ezinezendlalelo ezinhlanu zihlinzeka ngokuvikela okuthuthukisiwe kwesithiyo, okuzenza zilungele imikhiqizo ebucayi efana nokuvikela ilanga, okunamathiselwe komlomo, nokunakekelwa kwesikhumba okusebenza kahle kakhulu. I-EVOH (I-Ethylene Vinyl Alcohol) yengeza isendlalelo sokuvimbela esimaphakathi esivikela ifomula yakho kuyo yonke impilo yayo yeshelufu.