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#1 |
![]() I am getting into a condo unit that has Popcorn style texture on concrete ceilings. Someone has painted over the texture with a water based paint and texture is flaking off. I will be removing this texture and reapplying popcorn texture over the entire surface area.
My question is, what is the best primer for a concrete ceiling? Thank you in advance..... |
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#2 | |
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![]() Quote:
![]() Regarding the answer, I don't know. There're seemingly two types of primer available outthere: oil-base and latex. I would go with the oil-base, which penetrates more into the surface's pores and dries hard, thus provides a firm and good subtrate to work on. Zinsser CoverStain and BM Alkyd primer are good products. |
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#3 |
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![]() For bonding things like portland cement or gypsum plaster skim coat to almost any surface, here in N.E. there is available a product called Weld-o-Bond by Silpro
http://www.silpro.com/datasheets/Silpro_Weldobond.pdf It's looks and smells a lot like white aliphatic glue (Elmer's white glue) I've heard in Calif at the Big Box stores there is a similar product by USG that is displayed with the wall board and JC.
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#4 | |
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Poet, Actually, because of "saponification" oil based coatings can be disaterous on concrete or other lime based surfaces. Although the risks are most notable on uncured (high pH) surfaces, I have seen saponification when oil based coating were applied to old unpainted concrete. And although I am an advocate of oil primers on wood, waterborne primers have, for me, always obtained a better bond on things like gypsum plaster, JC, and wall board.
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#5 |
![]() Well beeing a ceiling company, I do know of what bonding agents to use but as you can see from my posts, that is my first one and I wanted to see what other novice' would use.
I have heard of people mixing weldbond right into their texture mix and even using weldbond as a Sealer/Primer. So with a name like Weld-o-bond, I am sure silpro has amalgamated with weldbond and created a ready to use application. Sheetrock also makes a product called First coat which is suppost to hide joint photographing and joint banding and states it is an excellent bonding agent for porus surfaces such as Concrete. I know, Joint bandign and Photographing have nothing to do with concrete but I thought I would through it in there anyway. I may try the Sheetrock First Coat as I do not particularly like running oil-base through my guns and Sheetrock is a Latex. Thanks guys..... |
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#6 | |
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I was going to say that a waterborne primer would have been better but I am still going through the thesaurus to find a better word than "saponificatication" . Maybe I'll hit the dictionary first ![]() |
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#7 | |
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"Turning to soap" or "hydrolyze" are real synonyms here is wikipedia's non-coatings specific explanation of the chemical process: http://en.wikipedia.org/wiki/Saponification
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#8 | |
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As you cajn read from the Weld-o-Bond pdf, it too can be mixed into the cement or plaster. I gotta say, about 30 years ago I tried to patch a small area in a ceiling using lime skim coat. It cracked and de-bonded almost immediately. A seasoned professional, after shaking his head at the stupid kid painter, suggested Weld-o-Bond. I've been sold on it ever since. I've used it to patch concrete, cement, plaster, etc. Whenever I feel there will be a bonding issue, I coat first with Weld-o-bond. I suspect Weldbond is as reliable.
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#9 |
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![]() Emulsabond mixed with any latex primer makes an excellent bonding primer
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The Following User Says Thank You to painterman For This Useful Post: | holmg418 (12-26-2013) |
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