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dbldee20 12-30-2008 10:33 PM

Best primer for bathroom ceiling
 
Hi

I need to scrape & paint my bathroom ceiling. My house is older & has plaster board walls. I have never painted the bathroom before(walls are completely tile). Signs of mildew & cracking due to moisture. I put in an exhaust fan/lite in shower & it helps cut down on moisture, but since my girlfriend moved in the shower gets used much more. I have thought about a louver type door also since she refuses to leave the bathroom door open when showering.

I have used Sherwin Williams "super paint" latex throughout the rest of house with good results. Is there an advantage to laquer based primer in the bathroom over latex?(I have always used latex kilz or zinister in past)

If I use laquer primer can I use latex paint over it?

Is it better to apply multiple coats of primer?

How long should I wait before using shower after Im done painting?

Is it ok to use Sheetrock joint compound in high moisture areas before I apply primer?

I plan on using a bathroom paint, but wasn't sure about what primer is best.

Thanks for any suggestions.

Matthewt1970 12-31-2008 11:49 AM

Oil based primer is going to bond to the plaster better than latex. Everyone here recommends the Zinsser Cover Stain and I do as well. It bonds well, covers stains and dries quickly. You really only need one good coat of it. Joint compound is fine in high moisture areas. You can paint right over the Cover Stain with latex paint. Being that you have high moisture, get a good bathroom paint over just a plain semi-gloss. It will help with any mold/mildew issues.

sirwired 12-31-2008 03:43 PM

Water-base primer (Like SW PrepRite ProBlock) should work just fine. It will certainly bond to joint compound just fine. (A primer that didn't bond to J/C would be worthless.) Make sure you have the entire bathroom well-cleaned with strong detergent (and rinsed) before priming and painting.

For paint, use Sherwin Kitchen&Bath paint (if you like Sherwin stuff well enough.) It has additional mildewcides which are a good idea in a bathroom.

SirWired

Matthewt1970 12-31-2008 06:14 PM

There were just 2 things that made me lean towards Oil Primer. 1) It's old plaster so it may have more Lime in it and 2) he said he had to scrape so there is already and adhesion issue.

sirwired 01-01-2009 08:02 PM

Whoops! Brain Fart! Missed the mention of plaster...

SirWired

dbldee20 01-04-2009 11:42 AM

Thanks for the info.

wilsonfrench 01-05-2009 12:45 AM

Quote:

Originally Posted by dbldee20 (Post 206688)
Thanks for the info.

does the primer need to be moisture resistant?

sirwired 01-05-2009 06:21 AM

No, that's the paint's job. Because of this, you definitely don't want to be taking any steamy showers while the primer is uncoated by your paint.

SirWired

wilsonfrench 01-05-2009 09:31 AM

primer and paint in bathroom
 
Quote:

Originally Posted by sirwired (Post 207200)
No, that's the paint's job. Because of this, you definitely don't want to be taking any steamy showers while the primer is uncoated by your paint.

SirWired

I used a latex primer (not sure if it was moisture resistant)....I need to paint now...
should I use an "oil" paint or "latex" paint in the bathroom? thanks

sirwired 01-05-2009 05:11 PM

You should use a latex paint specifically meant for bathrooms. It has mildewcide integrated into the paint to retard mold formation.

Most paint stores will carry at least one. Zinsser also makes one, called Perma-White.

SirWired

Bubbagump 01-06-2009 12:51 PM

Quote:

Originally Posted by sirwired (Post 205004)
For paint, use Sherwin Kitchen&Bath paint (if you like Sherwin stuff well enough.) It has additional mildewcides which are a good idea in a bathroom.

SirWired

Even for the ceiling? Doesn't that come only in glossy finishes? (Have a bathroom to do myself here soon, so I am curious.)

sirwired 01-06-2009 04:25 PM

The SWP bath paint does not come in a dead flat, but it does come in Satin. (The only other available gloss is semi-gloss.) Zinsser Perma-White comes in Eggshell, Satin, and Semi. (However, glosses are not really comparable between companies, so I have no idea how a SWP satin compares with a Zinsser eggshell.

Given that moisture tends to condense on the ceiling, I would think that it would be the most important place to have specialty bath paint. I would imagine that moisture would tend to collect and sit in the pores of a flat paint, which is probably why it does not come in anything but finishes with at least some gloss.

SirWired


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