Wong-wong bakal entuk lawas lan karet bakal umur .}}}}}}, ana sing lengket, lan cukur, retak, lan kekuatan asli, lan jupuk Macem-macem faktor eksternal, sing paling umum yaiku yaiku penuaan termal panas lan oksigen .
Oksidasi minangka salah sawijining sebab sing penting kanggo penuaan karet . oksigen kanthi ranting radikal (rantai molekul, lan ranting molekke, banjur luwih crossinta utawa luwih cerah karo karet {{2} {{2} {{2} {{2})
Nambah suhu kasebut uga nyebabake cracking termal utawa crosslinking termal saka karet, nanging efek dhasar panas yaiku aktifitas .} rame rumput oksigen . rame ultraviolet uga duwe efek cilaka rubber. In addition to directly causing the breakage and cross-linking of rubber molecular chains, rubber absorbs light energy to generate free radicals, which initiates and accelerates the oxidation chain reaction process. In addition, mechanical stress, moisture, chemical media, variable metal ions, high energy radiation, electricity and biology can also age the rubber.
Sanajan wong tuwa karet ora bisa nyingkiri, bisa ditundha . sing paling trep yaiku kanggo nambah zat sing aktif yaiku nambahi bahan anti-tuwa karet, saéngga nglindhungi karet {{4 {4})