How can efflorescence be removed?
Occasionally the deposit will just disappear with time, however, more often than not it is necessary for chemicals to be used. Here are some tips for using chemicals to remove efflorescence:
Use safe, acid-based, proprietary products in accordance with the manufacturer’s instructions. Leave it in contact with the surface for a few minutes before thoroughly washing off with clean water.
Please note: HG Limex or Lithofin Cement Away are suitable, but should not be used on marble or limestone floors, as they will attack the tile surface.
When tackling large areas, treat a small test area first. You want to be sure you’re using the correct techniques before you try treating the whole floor or wall.
Allow any new tile installation to dry out thoroughly before any sort of treatment with acid cleaners, as efflorescence could reoccur if more soluble salts are brought to the surface.
In general, sealing of floor tiles is not recommended. However, if used – for example, on terracotta tiles – then the installation should be allowed to dry out completely and the grout have dried to the required colour. Otherwise, once sealed, there will be no means of removal of the salt deposit.