I-calcium hydroxide (Ca(OH)₂), eyenziwa ngokufaka amanzi emcakweni oshisiwe. Yi-alkali eqinile esetshenziswa kudaka lomcako, ekugcotshweni ngomcako, ekupendeni ngomcako, ekulungisweni kwezikhumba (ukufaka umcako ukususa uboya), ekuhlanzweni kwamanzi nanjengento encibilikisayo. Uma ixutshwe nesihlabathi namanzi, ithatha i-carbon kancane iminyaka eminingi ibe idaka lomcako elihlala isikhathi eside.