Li-stabilizer tsa leseli ke lintho tsa bohlokoa tse thibelang ho oxidation ea foto le ho tsofala ha foto ha thepa ea polymeric joalo ka polasetiki, liphahlo le likhoele, li thibela ho senyeha ha ponahalo ea tsona le thepa ea mechini e bakoang ke mahlaseli a ultraviolet (UV). Li arotsoe ka lihlopha tse 'ne haholo-holo ho latela mekhoa ea tsona ea ts'ebetso, e 'ngoe le e 'ngoe e na le litšobotsi tse ikhethang le melemo ea ts'ebetso.

Li-absorber tsa UV (UVA) ke mofuta o sebelisoang haholo indastering, haholo-holo ho kenyeletsoa benzophenones, benzotriazoles le triazines. Tšobotsi ea tsona ea mantlha ke ho monya khanya e kotsi ea UV (290-410nm) ka khetho le ho e fetola matla a mocheso a se nang kotsi. Li na le tšebelisano e ntle le li-polymer tse ngata 'me ha li ame ponahalo ea thepa, empa katleho ea tsona e lekanyelitsoe ke molao oa Lambert-Beer, e leng se etsang hore li se ke tsa tšoaneleha bakeng sa lihlahisoa tse teteaneng.

Li-Halifiers tsa Leseli tse Thibetsoeng tsa Amine (HALS), e le li-scavenger tsa mahala, li sebetsa hantle haholo 'me li sebelisoa haholo. Li tšoara li-free radical tse hlahisoang nakong ea ho oxidation ho felisa karabelo ea ketane ea auto-oxidation, ka botsitso bo botle ba nako e telele esita le maemong a tlase. Li-HALS tsa polymeric tse kang Chimassorb® 944 li sebetsa hantle ho feta tse monomeric ka ho boloka matla a gloss le tensile, empa li na le alkaline 'me li ka arabela le li-substrate tse nang le asiti. Li-screener tsa leseli li sebetsa e le tšitiso ea 'mele pakeng tsa li-polymer le mahlaseli a UV, li bonahatsa kapa li thibela leseli la UV ho kenella kahare ho thepa. Mefuta e tloaelehileng e kenyelletsa carbon black le titanium dioxide, e nang le litšenyehelo tse tlase le litlamorao tse ntle tsa tšireletso, empa li na le thepa ea 'mala le ea ho sireletsa leseli, e loketseng feela lihlahisoa tse sa bonahaleng.

Li-quenchers, haholo-holo metsoako ea nickel ea tlhaho, li felisa matla a hlasimollang a li-chromophores ka har'a li-polymers e le mocheso kapa fluorescence. Li sebetsa hantle bakeng sa lifilimi tse tšesaane le likhoele empa li na le mefokolo e kang chefo e phahameng le ho fifala ha 'mala mochesong o phahameng, butle-butle li nkeloa sebaka ke mekhoa e meng e nang le chefo e tlase. Litšebelisong tse sebetsang, ho kopanya UVA le HALS ho ka finyella phello ea tšebelisano-'moho, ho ntlafatsa haholo ho hanyetsa boemo ba leholimo ba thepa.