Hoʻohui i ke kiʻekiʻe o ka elasticity o ka rapa me ka maʻalahi o ka hana ʻana a me ke kāwili ʻana i ka palakiko; kūpaʻa i ka mahana mai -60℃ a i 135℃, kūpaʻa i ka UV, kūpaʻa i ka ʻelemakule ozone, a ʻaʻole e māwae a paʻakikī paha i ka hoʻohana ʻana i waho no ka manawa lōʻihi. Kūpaʻa i ke komo ʻana a me ka haehae ʻana, kūpaʻa paʻa, sila a me ka hoʻopili ʻana i ka haʻalulu; ʻaʻohe mea ʻawahia, ʻaʻohe ala, hana hou, a aloha i ke kaiapuni.