Ko te mātotoru o te kowiri tira he 7.7 karamu/cm³. Ina whakamahia te maitai kore waikura i roto i ngā tukanga rerekē i roto i ngā ahumahi rerekē, ka whakaitihia te wā tuku e pau ana i ngā wāhanga i hangaia ki te maitai kore waikura. Nā te mea, nā te whakamahinga o te maitai kore waikura, kāore he take kia oti he whakaotinga. He nui ake te ngāwari o te maitai kore waikura, he nui ake hoki te tere whakapakeketanga mahi. He kaha ake te kaha wera o te maitai kore waikura, ā, he kaha ake te pakari ki te wai. E wātea ana te maitai kore waikura i roto i te neke atu i te 150 ngā momo, engari 15 noa iho ngā momo e whakamahia whānuitia ana. He mea tino pai mō te maitai kore waikura ko te 100% ka taea te hangarua.