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I just had my basement concrete redone and the guys got a lot of concrete on the painted walls. I want to make sure that my paint sticks well to the concrete wall and I don't know if it's going to do that with all the concrete splatter that's there.

I can run my hand down the wall and it gets all dusty.

here's the wall I'm talking about

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Lightly brush and vacuum off the dust. Then cover the fresh concrete with a clear pre-paint sealer. When dry you can paint as you would any surface.

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  • I would suggests "thoroughly" brush off the dust & vacuum it up. Maybe even a wipe down with a damp rag if it's really dusty. Paint that sticks to dust will fall off sooner rather than later.
    – FreeMan
    Oct 4, 2022 at 12:21
  • if you use sealer there is no dust. you have a sealed area primed for paint.
    – RMDman
    Oct 4, 2022 at 12:44
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    Does the sealer manage to magically make the dust stick to the wall? Even if it does, you're left with a rough paint job. Granted, OPs wall isn't the smoothest thing ever and he doesn't seem to be concerned, but on general principle...
    – FreeMan
    Oct 4, 2022 at 12:46
  • The answer is yes. pre-paint concrete sealer is low viscosity but very sticky. It's purpose is to bind the loose particles together to the surface it is applied to and provide a proper surface to apply paint. it's science, but I guess you could call it magic.
    – RMDman
    Oct 4, 2022 at 12:53
  • Adding those details into your answer (for those of us who don't know that) would make this a good answer and get my vote.
    – FreeMan
    Oct 4, 2022 at 12:57

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