Ulu mai zare na yumbu an san shi da abu mai hana zafi, wani abu ne na musamman wanda ke da ikon jure zafi. Ulu mai zare na yumbu mai hana ruwa ya ƙunshi silicate na aluminum, wanda ya haɗa da zare da aka yi da zare daban-daban na polycrystalline da gilashin narkakken ruwa. A matsayin kayan da ya dace don rufin, ulu mai zare na yumbu yana zuwa cikin nau'ikan iri daban-daban kuma ana iya amfani da shi don aikace-aikace da yawa.
An yi ulu mai zare na yumbu da kayan aiki masu tsabta bayan narkewa a zafin jiki mai zafi ta hanyar feshi ko kuma kin amincewa da waya. Ulu mai zare na yumbu mai tsauri tare da siffofi masu ƙarfi, nauyi mai sauƙi, ƙarancin ƙarfin zafi da juriyar girgiza mai kyau a zafin jiki mai zafi. juriya ga zaizayar ƙasa da shan sauti. Watsawar zare na yumbu na aesop shine babban kayan samfuran jerin zare na yumbu na Aesop.
Dangane da yanayin aiki da sinadaran da ke cikin allon zare na yumbu, za a iya raba shi zuwa nau'i shida.
| Samfurin Kaya | NA GARGAƊI | ST | HP | HA | HZ | |
| Tsarin Zafin Rarraba (ºC) | 1100 | 1260 | 1260 | 1360 | 1430 | |
| Zafin Aiki (ºC) | <1000 | 1050 | 1100 | 1200 | 1350 | |
| Launi | fari | fari | fari | fari | fari | |
| Dia na fiber (um) | Hura iska | 2~3 | 2~3 | 2~3 | 2~3 | 2~3 |
| Yin lilo | 3~4.5 | 3~4.5 | 3~4.5 | 3~4.0 | 3~4.0 | |
| Sinadarin sinadarai (%) | Al2O3 | 44 | 46 | 47~49 | 52~55 | 39~40 |
| Al2O3+SiO2 | 96 | 97 | 99 | 99 | – | |
| Al2O3+SiO2+ZrO2 | – | – | – | – | 99 | |
| ZrO2 | – | – | – | – | 15-17 | |
Ulu mai zare na yumbu don dalilai na rufi ya shahara sosai a zamanin yau. Kusan dukkan kamfanoni a yau suna buƙatar waɗannan samfuran saboda galibi ana amfani da su don sarrafa zafi. Ulu mai zare na yumbu mai hana ruwa ana amfani da shi sosai ta kamfanoni daban-daban waɗanda suka haɗa da ayyuka da hanyoyin ƙera kayayyaki waɗanda ke haifar ko amfani da yanayin zafi mai zafi. Ana amfani da waɗannan kayan a aikace-aikace daban-daban kuma suna zuwa cikin nau'ikan daban-daban. Haka kuma, ulu mai hana ruwa na yumbu ana amfani da shi a wurare masu zuwa.
Kamfanin RS Refractory Factory ƙwararre ne wajen kera ulu na zare na yumbu wanda aka kafa a farkon shekarun 90 na ƙarni na ashirin. Kamfanin RS Refractory ya ƙware a fannin ulu na zare na yumbu mai hana ruwa tsawon shekaru sama da 20. Idan kuna da wasu buƙatu na ulu na zare na yumbu, ko kuma kuna da wasu tambayoyi game da ulu na hana ruwa na zare na yumbu game da alamun zahiri da sinadarai, da fatan za a tuntuɓe mu kyauta.