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Sealing/Priming old plaster

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  • Sealing/Priming old plaster

    I am seeking recommendations on the best sealer/primer for old (70+ Years) plaster applied onto brick. I've stripped ceilings of a layer of heavy paper, two layers of old wallpaper (who ever thought wallpaper on the ceiling was a good idea shoudl be shot), cleaned with TSP and rinsed. I now need to seal the plaster so I can start mudding and painting.
    Which works best;

    Loxon (Sherwin/Williams)

    Anyone else that makes a good primer. The ceilings are 9' 8" and I really want to get them smooth and sealed properly so I don't have to do this again. Thanks in advance.

  • #2
    Re: Sealing/Priming old plaster

    Any of those will work fine. If I plan on mudding over I use solvent based.

    Zinnser coverstain would be my choice.


    • #3
      Re: Sealing/Priming old plaster

      I just used zinnser primer on an old outdoor PT wood deck. It covers the stains as advertised.

      ... it was plumbed by Ray Charles and his helper Stevie Wonder


      • #4
        Re: Sealing/Priming old plaster

        Sherwin Williams makes an oil based primer that dries in an hour. It's called fast drying primer for some reason. It is alkyd based and will prevent festering when using joint compound over plaster.


        • #5
          Re: Sealing/Priming old plaster

          Thanks everyone, will let you know if any problems arise when I start mudding/painting.