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Discuss Do I need to seal unglazed PEI 5 porcelain in the Tiling Forum area at TilersForums.co.uk.

Tags:
  1. Filip

    Filip Active Member

    Location:
    Midlands
    I think I have decided on my tile for an outdoor but mostly dry space protected on 3 sides but can have rain blown in - see picture. The tiles are PEI rating of 5 this full bodied porcelain and come unglazed. I then start reading about stains and sealing and start to doubt my choice (haven't got them yet ) the fella in the store says I do not need to seal, they are these . I have brought a couple to test and have a range of stuff on them to see if they do stain.
    The yellow line marks the extent of the roof coverage

    P10874.jpg P1000878.jpg P1000884.jpg
     
    Last edited: May 11, 2018
  2. Filip

    Filip Active Member

    Location:
    Midlands
    Ok I have come back to answer my own question but would still appreciate an experts view.
    I have done some tests with grass,coffee,oil(olive) sharpie pen, biro, vinegar, and left it on for 18 hours. And none it has left any mark whatsoever. I am also ding a water absorption test and so far after 18 hours there has been no gain in the 108g starting sample weight

    View attachment 98669
     
  3. Andy Allen

    Andy Allen Metro specialist & forum entertainer! Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    Gloucester
    Your tiles are probably glazed porcelain and do not require sealing.

    The only porcelain tiles you need to seal are polished porcelain tiles.
     
    • Like Like x 1
  4. Filip

    Filip Active Member

    Location:
    Midlands
    These are the ones
    The second slideshow picture on the page says
    • Porcelain Floor Tiles
      Perfect for areas of increased footfall, these hard wearing unglazed porcelain floor tiles will stand the test of time.
     
  5. Filip

    Filip Active Member

    Location:
    Midlands
    Just seen that my picture was not there with my test tile, here it is. I put a few drops of water on it and then added instant coffe very strong.

    P1000888.jpg P1000889.jpg
     
  6. Andy Allen

    Andy Allen Metro specialist & forum entertainer! Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    Gloucester
    I must be missing something, cant see anything that says the tiles are unglazed, just full body porcelain..
     
  7. Albert

    Albert Trusted Advisor Professional Tiler

    Location:
    Gateshead NE8, UK
    The tile is Vitra dotti and is unglazed. I thought all full body porcelain
    was unglazed
     
    • Informative Informative x 1
  8. Filip

    Filip Active Member

    Location:
    Midlands
    The only place I can see it says it is on the second slideshow picture - here is a screenshot

    Cture.JPG
     
  9. Lithofin BOB

    Lithofin BOB Test, Test, Test, you know it’s for the best. Company Support

    Location:
    Hampshire
    Good test, haven't heard of any external grade porc that requires impregnating. Maintain only

    Check your grout release on install, on a spare tile maybe, with the extra texture. a lot of the external boys are using bal temp sealer if they have problems to aid release.
     
    • Informative Informative x 1
  10. Filip

    Filip Active Member

    Location:
    Midlands
    Thanks for the grout heads up. I have some Tilemaster 3000 in charcoal and will do a test with that.
     
    • Like Like x 1
  11. Filip

    Filip Active Member

    Location:
    Midlands
    Ok thats the end of the water absorption test because after 24 hours I want my pint glass back.
    Result - no weight gain.
    2nd result - beer for me
     
  12. Filip

    Filip Active Member

    Location:
    Midlands
    Ok I have now done a grout test and that is fine, infact nothing seems to stick to this tile, I do actually need something to stick to it - namely adhesive. So I have done a grout test on the back and that is a lot more difficult to get off. Picture attached. The tiles are marked on the back Made in Turkey - is that good ?

    P1000891.jpg
     
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