The precast elements are saturated with water and then treated with diluted hydrochloric acid to remove the smooth surface and expose the sand or sand-oxide matrix.

General Remarks

Bianco Precast clean all treated surfaces with high pressure water to remove any residual chloride ions.  Architects should also be aware that any minor repairs required due to handling, transport or installation damage are likely to be noticeable.  It should be understood there may be some colour inconsistency.