Do I need to seal cinder blocks before painting?

Shannon W
by Shannon W
I have seen so many pretty patio projects with cinder blocks that people have stenciled or just painted nice colors but when I tried to spray paint mine, the paint just got absorbed :( Do I need to apply something to keep the paint on the surface?

  9 answers
  • Yes, as with all paint jobs they need to be cleaned and primed. Then your paint will be nice and crisp.

  • Janet Panos Janet Panos on Apr 18, 2018
    Hello. There are several products out there that will seal your concrete prior to painting. A popular one is called Seal-Krete. It is sold at your local home store or online. This must be applied prior to painting because concrete is porous and, as you discovered, concrete will absorb your paint without that sealer applied first. Good luck!

    • See 1 previous
    • Janet Panos Janet Panos on Apr 18, 2018
      You’re welcome. I know what you mean. I actually recently found out about this too. Good luck!!

  • Tonitownsend1 Tonitownsend1 on Apr 18, 2018
    it's best to seal them if you want your paint to stay on unless you want to repaint each year. the cinder blocks hold dampness and will reject the paint, plus you have the weather that will help peal the paint off if there is no sealer. It's your call.

    • Shannon W Shannon W on Apr 18, 2018
      Lol, no I don't want to repaint each year ;) I think I will try looking into the sealer for my projects... I learn so much on Hometalk!

  • Ebbjdl Ebbjdl on Apr 18, 2018
    The cement is porus, it's soaking the paint right up, you need some type of sealer or primer to illimenate the problem.

    • Shannon W Shannon W on Apr 18, 2018
      Thank you so much for your response- I will definitely try using a sealer :)

    • Shannon W Shannon W on Apr 18, 2018
      Janet, thanks so much. This looks like exactly what I need to do (if only the darn snow would stop so I can get to working outside :)

  • Janet Pizaro Janet Pizaro on Apr 18, 2018
    I hear that one ....this is the most frustrating season

  • We had three 75 degree days in a row, I left my house plants on the porch overnight and it snowed and froze killing them all!

  • Johnavallance82 Johnavallance82 on Apr 05, 2021


    bEST TO USE A mASONRY pAINT! Apply a Sealer coat first.

  • Johnavallance82 Johnavallance82 on Jul 19, 2021

    Hi Use a Masonry Primer!