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I am trying to paint my garage and noticed that there are gaps where drywall meets cinder blocks and between drywall and concrete slab in the garage. Is there a way I can seal and paint the cinder blocks to make it look uniform. Also it makes life easy by not holding on to dust and cob webs when the blocks are sealed, not to mention the ease of cleaning with water when needed. Whenever I do some woodwork in the garage, its a challenge to clean the area, on top it the blocks appear to absorb water when washed with hose.

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For the exact reason you touched upon you don't want to bring those two components together. The drywall will leach water from the concrete, breaking it down and creating stains.

Instead, finish each separately with appropriate paint and use a plastic T-molding or other transition to cover the seam. I'd consider using the epoxy that I see on your slab to do the block.

  • Could you please explain "plastic T-molding or other transition" and also epoxy? Could you share sample links or images? Thanks very much. – aparente001 Mar 2 at 0:18
  • Google shows some great examples of a "plastic T-molding". Epoxy refers to the floor coating shown in the photos. Several companies make good options. – isherwood Mar 2 at 14:24
  • Thanks. So you insert the little thing that sticks out in the gap between the two parts, and let the symmetrical parts cover the edges of the two things that are butting together? Okay, I think I get that. // I know "epoxy" as a special adhesive that you make by mixing two substances together with a special dual syringe sort of thing. Is that what you're talking about? Is it waterproof -- is that why you recommend it? – aparente001 Mar 3 at 4:03
  • I don't think you can trust the gap to retain the T-molding's installation strip since it won't be consistently the right size. You'd need to use panel adhesive or something in addition. Search "epoxy floor paint" to learn about that. – isherwood Mar 3 at 17:19
  • I don't get it. Are you arguing against your own recommendation? – aparente001 Mar 5 at 6:39

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