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Old 10-04-2013, 10:39 PM   #1
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Primer coat will not adhere to bedroom wall


I am using primer to paint over what appears to be an old flat latex paint in a bedroom. No matter what I do to prep the surface, like TSP or light sanding, the primer will not adhere. For example, after loading the roller and making one pass, if I roll back over the fresh pass, or the previous pass next to it, the primer comes right off.

My workaround so far is to roll the first pass and move on - in other words, do not paint over what was just painted. The problem with this is that ugly roller lap marks cannot be removed. Any help would be appreciated. Ultimately, I am trying to paint over a darker beige color with an off-white finish coat. Thanks!

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Old 10-05-2013, 03:56 AM   #2
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Primer coat will not adhere to bedroom wall


Sounds like something is contaminating the wall, also what primer are you using. If you used tsp, it needs to be rinsed and rinsed and rinsed with fresh water.

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Old 10-05-2013, 07:56 AM   #3
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Primer coat will not adhere to bedroom wall


^^^^That was my first thought rinse the TSP.
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Old 10-05-2013, 08:24 AM   #4
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Primer coat will not adhere to bedroom wall


Chris and TS are correct. Gotta get that TSP off. Also, you're not gonna get any kind of great coverage with the primer over a dark color. Also, you really don't need to prime unless you are going to put on a drastically different color. Just my 2 cents'.

Another thing is technique. Load that roller up with primer. It should ALMOST be dripping wet when pulling it up out of the roller tray. Let the roller do the work, don't push it, roll it. Re-load often.
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Old 10-05-2013, 09:41 AM   #5
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Primer coat will not adhere to bedroom wall


if your use a quick drying bonding primer you can not over work it.the primer is starting to tack up and by back rolling your interfering with the drying process. Roll it on and move on . p.s if in fact it is and old flat latex finish ,just skip the primer and 2 coats of good quality finish paint .bing bang boom done

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Old 10-05-2013, 08:22 PM   #6
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Primer coat will not adhere to bedroom wall


Thank you all for your replies. This is a Wonderful Forum!

ChrisN you were right about the TSP and rinsing. I went back and rinsed over it three separate times and still the TSP was foaming on the wall, and the fresh rinse water was cloudy. Is there a better product to use than TSP? How about just a few drops of dish detergent in water?

LTD, thank you for explaining about bonding primer. I was treating it like regular latex paint that can be gone over on a second pass. What you said makes perfect sense.
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Old 10-06-2013, 03:23 AM   #7
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Primer coat will not adhere to bedroom wall


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Old 10-06-2013, 11:42 AM   #8
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Primer coat will not adhere to bedroom wall


TSP is kind of old fashioned now I think. There are TSP substitutes that should be more than adequate at cleaning your wall. Look for "phosphate free" TSP, which is a misnomer of course, because the P in TSP stands for phosphate. Instead of trisodium phosphate, it might be trisodium metasilicate, such as in Dirtex. Or just look for something labeled "TSP substitute". Some of these are advertised as no rinsing required, whereas TSP must be rinsed very well.

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