Sealer applied to porcelain but now any water turns tiles white

Discussion in 'Tilers' Talk' started by Matt Perry, May 14, 2018.

  1. Matt Perry

    Matt Perry New Member


    My bathroom fitter finally finished the tiles last week after a bit of mess up. He left the grout on the tiles for about two hours as he basically finished two walls then went back to clean. It didn't come off and he spent literally the next 5 days scrubbing and scrubbing the tiles. It was eventually acceptable to me that they were clean so he sealed them. The sealer bottle said to leave it for 60 minutes but we gave it a good 24 hours.

    A day later when first using the new bathroom any water on the tiles at all they turned immediately white. Both the floor and wall tiles, which the floor ones didn't have the grout issue do exactly the same. The wall tiles are grey and floor black, not that it matters. Literally a drop on the floor tiles and it goes white in about 3 or 4 minutes like it's reacting to something.

    It looks absolutely horrible at the moment and I expect the whole job will need to be redone.

    Does anyone have any advice?

  2. Dr Bodgit

    Dr Bodgit Well-Known Member

    What sealer did he use? Sounds like it might be PVA! I thought the whole point of tiles is that they don't need sealing.
  3. KIAB

    KIAB Well-Known Member

    Porcelain tiles do need sealing, to stop them staining.
    Dr Bodgit likes this.
  4. Dr Bodgit

    Dr Bodgit Well-Known Member

    I defer to know it all.
  5. Isitreally

    Isitreally Well-Known Member

  6. dobbie

    dobbie Well-Known Member

    The vast majority of porcelain tiles do not need sealing.
    Know it all is wrong.
    Dr Bodgit likes this.
  7. Matt Perry

    Matt Perry New Member

  8. Matt Perry

    Matt Perry New Member

    On the advice of the tile shop where we got the tiles, it was Lithofin Multi-Seal and water-based sealant.

    I wonder if we can actually get it off now or are they ruined?
  9. Dr Bodgit

    Dr Bodgit Well-Known Member

    How many coats were applied? Did a bit of googling, the tiles going white could be an indication that water is getting through the sealant into the tiles, so if its just one coat applied you may be need 1 or two more to properly seal it.

    Apparently 75% of the sealant needed with be applied on the first of 3 coats needed perhaps.


    All porous surfaces should be impregnated with the appropriate Lithofin product prior to sealing with Lithofin MULTI-SEAL

    Was this done too?

    Directions for Use

    The surface to be treated must be clean and completely dry. Apply Lithofin MULTI-SEAL undiluted and spread evenly with a brush, roller or sponge. Two to three coats will generally be needed in order to achieve a uniform appearance. Allow one to two hours drying time between coats.
  10. Matt Perry

    Matt Perry New Member

    I'll check with him how many coats but the bizarre thing is it goes white within about 2 minutes. I don't think an impregnator was used as the bottle only says "On a highly absorbent surface such as terracotta, we recommend an impregnator"... The tile shop can't understand either and have suggested that they will send a representative out to verify it all, so I am getting somewhere.

    Attached Files:

  11. Dr Bodgit

    Dr Bodgit Well-Known Member

    That's about enough time for water to soak through the slightly permeable sealant and hit the tiles.
  12. KIAB

    KIAB Well-Known Member

    Apologies Dr B, I lost my connection,plus a bit of my sentence,which was badly worded for some:rolleyes:, porcelain tiles don't need to be sealed, but can be sealed to stop staining,make them no slip,etc, it's same for quarry,ceramic,natural stone,etc.

    Also sealing will protect the grout from staining or discolouring.
    Last edited: May 14, 2018
  13. dobbie

    dobbie Well-Known Member

  14. fostyrob

    fostyrob Active Member

    Not my area of expertise but you say he scrubbed them for 5 days. What did they look like prior to sealing? were they glazed etc before and he has removed some of whatever the top surface was? Your second picture looks like a drip of something- is that the appearance after contact with a single drip of water or is the whole tile been wetted and that the only area that is affected?
  15. KIAB

    KIAB Well-Known Member

    Normally most are factory sealed.
  16. fostyrob

    fostyrob Active Member

    I'm just wondering if the 5 days of scrubbing off the grouting material has similarly scrubbed off the top and consequently the sealing of the tile?

Share This Page