Just bought a 1960 house with unfinished portion of a basement that has had previous water intrusion and the crack has been injected. There are a few lingering cracks I want to deal with. Wall has weird stucco/popcorn type of concrete coating, swirled on about 1/16 inch thick. I want to put liquid rubber primer and a sealant on this entire wall. Can I just primer it then seal it with a liquid rubber product as it is or should I get to bare concrete? Thanks!

  • how well is it bonded to the wall?
    – Jasen
    Jan 23 at 6:16
  • 1
    Step one would be the sample to an asbestos lab before generating dust, for "popcorn texture" in a 1960 house. Suspect until proven otherwise.
    – Ecnerwal
    Feb 22 at 21:17
  • And no, we won't be able to tell if the texture material contains asbestos by looking at a picture of it - it will need to be tested.
    – FreeMan
    Feb 23 at 12:15
  • @ecnerwal have you ever seen popcorn texture on walls? I have not it is way two soft. We could probably tell with a good clear photo on this one.
    – Ed Beal
    Mar 6 at 17:59

That is a skim coat and depending on how well it was applied it can be difficult to remove. I use a needle scaler (welders use these to relieve stress and quickly clean slag from rust) I got my first one from harbor freight years ago and literarily war it out doing similar work. It is not hard but time consuming. I don’t know if there is an electric version but it was recommended by a friend that is a millwright. needle scaler. I googled needle scaler and there are quite a few on line the last one I purchased from HF has probable been used over 100 hours, the one before that lasted 10+ years they really make the job easy. I have no connection to HF except having purchased a few of there tools some are real junk but I have a few that have been recommended by friends that have lasted well beyond my expectations.

  • "All surfaces must be free of grease, oil, wax, salt, dirt, and other contaminants." – rustoleum.com - if it doesn't come off with a scaler, it isn't a 'contaminant'. - I can just about quote that by heart, but I still read every label. "RTFM"
    – Mazura
    Jan 23 at 20:02

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