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Old 04-19-2007, 11:10 PM   #1
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best mildew resistant paint?


I am looking at repainting a couple of bathrooms that are very humid and warm throughout the day. Right now they have an oil based semigloss paint that has started peeling off in places. What would be the best primer and paint in this situation? I am looking for durablity and mildew resistance. Also are mildewcide additives a viable option or can they mess up the chemical composition of the paint?

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Old 04-20-2007, 07:45 AM   #2
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best mildew resistant paint?


I have had great results so far with Sherwin Williams Bath Paint. I painted my bathroom last year around this time and I haven't had a hint of a problem. Washes really nice too. Hard to imagine putting it to more of a test than I have - I painted around the tub surround rather than tiled. Albeit its temporary until I get to retiling all the walls in the bathroom, but it seems like it would hold up permantely. The paint above my surround takes routine direct splashing from the shower and hasn't had one iota of a problem.

I think I primed w/ preprite by Sherwin for that project but I've pretty much resigned to using Zinnser Bullseye 123 for most other applications except dark surfaces or stained surfaces.... Then I go with Bin or Coverstain depending.

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Old 04-20-2007, 08:01 AM   #3
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best mildew resistant paint?


The Sherwin William's bath paint, and the Ben Moore's Kitchen and Bath paint are both excellent

The absolute best mildew resistant paint is Zinsser's Perma-White
It's mind boggling how well it works
The only drawback is it's only tintable to light colors and pastels

You'll need to prime with an oil-based primer first
I's stick with the same brand if possible
(BM's Fresh Start primer, Moore's K&B paint, etc...)
But any quality ones will do

The additives work OK also
But if possible, I prefer the factory designed ones
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Old 04-20-2007, 03:58 PM   #4
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Will the Zinsser Perma-White hold up to routine direct splashing like the Sherwin Williams Bath Paint?
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Old 04-20-2007, 04:25 PM   #5
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best mildew resistant paint?


Quote:
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Will the Zinsser Perma-White hold up to routine direct splashing like the Sherwin Williams Bath Paint?

Slick doesn't around when it comes to painting cabinets or when it comes to mildew - he only would have suggested the Zinsser if he thought it would do a better job than both SW and BM - but any of the three will suit you just fine.
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Old 04-21-2007, 04:43 PM   #6
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best mildew resistant paint?


Ha ha...no I don't mess around when it comes to mold/mildew

Z's P-W will hold up as well or better than any Bath paint when it comes to direct splashing, keeping in mind that there shouldn't be daily direct splashing on drywall
If there is, a backsplash would be in order

But yeah, the P-W holds it's own real well
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Old 04-21-2007, 10:33 PM   #7
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best mildew resistant paint?


Do you always have to oil base prime before you paint a bathroom ceiling? And what happens to the ceiling if you didn't?? GULP!!
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Old 04-21-2007, 11:46 PM   #8
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best mildew resistant paint?


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Originally Posted by diylady View Post
Do you always have to oil base prime before you paint a bathroom ceiling?
Nope
This case is unusual as it has oil paint already on there
It needs some oil-primer to then coat with latex paint
Quote:
Originally Posted by diylady View Post
And what happens to the ceiling if you didn't??
In this case, the latex could slide right off



If it's latex, but semi-gloss (often found in bathrooms), it's usually a good idea to scuff sand and prime, but the primer can be latex in that case
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Old 04-23-2007, 05:48 PM   #9
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best mildew resistant paint?


Oil based primer will promote mildew.
Mildew loves alkyd paint.
I would prime with Zinsser's Bulls eye first, also mildew resistant.
And it is super adherent, making it a great conversion primer (oil to latex)
and finish coat with the Perma-White.

Last edited by George Z; 04-23-2007 at 05:50 PM.
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Old 04-23-2007, 07:57 PM   #10
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best mildew resistant paint?


Zinsser's Perma White, as previously mentioned is a great mildew-proof paint. Zinsser adds ground mildewcide into the paint as it is made, which is much strong than the additive that paint stores can add into any paint. It also carries a 5 year mold and mildew proof guarantee.
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Old 04-30-2007, 01:41 AM   #11
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best mildew resistant paint?


There should be some ventilation in the bathroom, regarless of what paint is used.

Even though oil is a mold magnet, we'd have to go through all the primers individually to determine which ones actually still use oil in them. Most are solvent based.

Too much mildewcide will have an effect on paint, probably the reason zinser has limited tintability.
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Old 04-30-2007, 07:11 AM   #12
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best mildew resistant paint?


We use oil-based primers in humid bathrooms (that have no vapor barrier under the sheetrock) to act as a vapor barrier

Especially when properly coated, oil primers do not attract any mold or mildew, and work well as a vapor barrier to keep moisture out of the inside of the wall
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Old 04-30-2007, 03:07 PM   #13
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best mildew resistant paint?


Slickshift when you say "properly coated" what do you mean?

If the primer is in between the old paint and new paint can mildew get to it?

Would the Perma - White be more durable and longer lasting with oil based primer instead of water based, or is it just an issue of the paint sticking to the walls when you first paint?
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Old 04-30-2007, 04:02 PM   #14
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best mildew resistant paint?


I'm being careful...lol...

I've lived and worked on the shore, the land of rust and mildew for decades
I've never noticed a difference in oil vs. latex per say
It's always about moisture/food/warmth etc...

If there is a slight tendency for oil primers to harbor mold or mildew, it absolutely would be negated by the proper (complete two coat) coverage of Z's P-W...there's no way for mold to get to it

I suggested the oil-based primer because of the oil paint already on the walls...it's an adhesion issue...some latex paints will slide right off

But as I mentioned, oil-primer is also used for moisture laden baths with no vapor barrier behind the sheet rock, to keep moisture from settling inside the wall, allowing mold and mildew to grow inside the wall
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Old 04-30-2007, 06:24 PM   #15
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best mildew resistant paint?


So, review with me, if the bathroom ceiling has white oil base, repaint with oil primer then oil base? Does that need to be sanded first?
If I want to change to latex, sand, then latex primer then latex base?
I'd like to get away from the oil if practical.
What about a kitchen ceiling, same scenario?

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