Ihe ndị bụ isi nke ọnụ ụzọ ọkụ osisi bụ osisi ịnweta ajị anụ, bọọdụ gypsum na-ekpuchi ọkụ, osisi bead na-ese n’elu mmiri na osisi vermiculite, nke nwere ọrụ dị iche iche. Ọnụ ụzọ ọkụ osisi nwere agba na-egbuke egbuke na ụdị dị iche iche nke mkpuchi ihu.

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