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Oil based paint over Latex? No need for Primer?

Posted by jasonuncloned (My Page) on
Wed, Oct 20, 10 at 18:04

Hi Everyone,

I'm in the final stages of cleaning up an utter disaster of a painting project. I moved into a rather unfinished looking artist loft space where the owner had improvised adding the extra plumbing for the shower in the bathroom by running pipes along the floor and building a raised plywood platform floor above that. So I had a red plywood floor in my bathroom when I moved in!

Well I wanted a normal color for that instead of barn red, so I proceeded with painting it using Dutch Boy Latex Porch and Floor Paint. Of course the know nothing Menards employee said "Oh you don't need primer, it's mixed right in the paint."

So I did 2 full coats and 2 days later after I thought it had dried fully I started removing tape off of the walls near the floor. It pulled paint off in CHUNKS. Once it got loose the paint continued to peel and I considered it to be a total loss so I just started removing it. I used a paint type testing strip that it was in fact Latex I painted on, so maybe I screwed up by not using a primer or not giving it proper curring time before I peeled the tape.

Anyway, I've now removed all of the paint, and in some areas resorted to using paint stripper to get it down to bare wood. I also hit the entire floor with a palm sander to rough up the surface, and there is no glossiness left to it. I want to make sure that this time I do NOT screw it up as I am most likely moving out in the next few months.

So I'm torn as to what I want to cover it with.

1) I use a true Alkyd/Oil Floor & Deck Enamel. I spoke to a legitimate paint store yesterday (they even MAKE their own industrial coatings) and they recommended that I just paint right over the latex with a Pitsburgh Paints Alkyd/Oil Porch and Floor Paint. I'm hesitant to do this though because A) I'm still not sure I should skip the primer this time. B) I don't know if I want a glossy, smooth and potentially slippery paint on my bathroom floor! I hate to step out of the shower, slip, and crack my head open when I'm reaching for a towel.

2) I use an oil based primer like Zinsser Fast Prime or Cover Stain, or a shllac based B-I-N Primer then follow up with whatever acrylic based paint is appropriate. Back to the previously mentioned concern of a slippery smooth oil based surface, this may be safer on a floor that I expect to be wet. The main thing here is proper adhesion.

So what do you think will be the better adhering option?

Straight up Oil based paint right over the latex sans primer?

OR

Oil based Zinsser Primer and a porch and floor latex?


Follow-Up Postings:

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RE: Oil based paint over Latex? No need for Primer?

You probably do not need a primer. I'm not even sure that I would use an oil based coating. A high quality acrylic floor coating would probably be fine. Dutch Boy is certainly not considered high quality, but the issue could have been curing. If you pull tape and do not score the line where you want the tape to break away, you can pull the paint off. The paint will stick better and bond better and become more durable as it cures (up to a month). Paints in bathrooms can take longer to cure because you are showering in there and putting moisture in the air which can sometimes re-wet the paint film. Use the fan, take shorter showers, shower with the door open, etc..whatever you can do to help that paint cure. There are no-skid, non-slip additives you can add to the paint if you are worried the surface will be too slick.


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