ʻO ka pepa alumini pepa e pili ana i ka pepa i hana ʻia me ka pepa kākoʻo alumini a me ka pepa alumini. He palupalu a maʻalahi hoʻi e deform, e like me ka pepa, ʻaʻole e hoʻihoʻi hou ma hope o ka deformation. Hiki ke qualitative, e hōʻoia i ka pale, ʻaʻohe hāʻule, opaque, ʻaʻohe pollution, kumukūʻai haʻahaʻa. Hoʻohana ʻia ia no ka hoʻomaʻamaʻa-hōʻoia a me ka hoʻonaninani ʻana o nā cigakeke kiʻekiʻe, nā lole a me nā meaʻai ʻē aʻe.