Assertion: cleansing agent's acid | /r/CapableOf | leave colloidal silica deposit
Facets:
value: on masonry
type: LOCATION
Source sentences:
text: While this efflorescence may usually be removed by a second cleaning—although it is likely to be expensive and time-consuming—hydrofluoric acid can also leave calcium fluoride salts or a colloidal silica deposit on masonry which may be impossible to remove.