Sealing a concrete floor

Discussion in 'Buildings & Infrastructure' started by Repeat, Oct 4, 2017.

  1. Repeat

    Repeat Member

    Location:
    Cumbria
    Could anyone recommend a good product for sealing an existing concrete floor in a barn.
    And the best way to do it.
    We are converting a shed for commercial storage and it will have forklifts running on it
    Its quite dusty at present, i have heard it can be an unpleasant job so i am trying to wash it first and see what its like.
    thanks
     
  2. Nearly

    Nearly Member

    Location:
    YO7
  3. Is the concrete smooth or rough?
     
  4. Repeat

    Repeat Member

    Location:
    Cumbria
    it was tamped with a screed with an engine on but not floated etc. about 8 years ago. there is some dust coming up from it, so reasonably smooth , you can brush it with a soft broom.
     
  5. I've used SBR quite successfully
     
    7600-four pilot likes this.
  6. anzani

    anzani Member

  7. A1an

    A1an Member

    I used a concrete sealer from our local building supplier, I applied it using a knapsack sprayer, it worked a treat.
     
  8. RagnarHairybreeks

    Location:
    Gloucester
    I use a phenolic resin, airless sprayed. It sinks very, very quickly into the surface and air-dries to lock everything together.

    Don't use it on very fresh 'crete though as it turns it purple. Colourless on aged surfaces.
     
  9. Repeat

    Repeat Member

    Location:
    Cumbria
    Thanks for all the replies
    Would you have a brand name / source for the product you have used ?
     
  10. RagnarHairybreeks

    Location:
    Gloucester
    @Repeat I do - but I'm in an odd position where the resin I use is an engineering material at around £15 per litre that I can get for free now and then (it has a shelf life theoretically, so if any comes up 'out of date' I snaffle it). I use it to protect outdoor wood, concrete, anything inherently porous that I want to last.

    The important ingredients are n-butyl acetate at 30 to 40% by weight and nitrocellulose at 10 to 15% by weight - although I'm sure there are plenty of other configurations out there. I'm sure you'll be able to source something at a lot less cost than buying the stuff I use. Having said that, I treated 65 square metres with seven litres the other day (my concrete hard standing) so it does go a long way.
     
  11. Are you painting it as well? I've painted warehouse and workshop with thinned first cost to seal then full strength second coat. On old concrete not super smooth
     
  12. Repeat

    Repeat Member

    Location:
    Cumbria
    No , just want to have a dust free floor for our new tenants
     
  13. Hotbed

    Hotbed Member

    Try sikaflex concrete sealers, they must be good as the power float guys we use won't use anything else.
     

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