Kilz-oil based primer

[NUTTSGT]

I'm not going to bash the product as I feel that it's a damn good one. I have recommended more than once to use it in the garage to cover walls, like OSB, which ***** it right up. In my refurb thread, I have used it alone with great results, until yesterday.

I touched a few spots and put 2 coats on some fresh OSB. I went out to the garage yesterday (been too hot) and found out I had a slight problem.

As you can see, the older Kilz primer has yellowed in the past 1 1/2 years. It's not from nicotine as I do not smoke but I do have a woodburner so some smoke does get in the garage. I don't know if this is normal for the primer or not. I will from now on make this recommendation, top coat your Kilz primer.

If anyone has used Kilz-oil based primer alone from my recommendation or seen that I used it in my refurb, please top coat it to keep your garage looking nice. I apologize and I'm sorry for the bad advice, I didn't know it would yellow over time. It looks like I will be repaint almost the entire inside of my garage over the winter.

 

[rlitman]

Um, that's why it is called PRIMER and not paint.
That stuff is excellent as a first coat on bare wood (or OSB), but yeah, that's what happens to it over time. Honestly, it's not so white to begin with.

 

[Gary S]

Agreed. All you need to do now is topcoat it with any latex paint, and it should look great. The job of the primer is to seal the wall under it. That is done, now a coat of paint should finish it so it looks great.
I painted my OSB garage walls with a cheap oil based primer. It sealed the OSB, but the color wasn't even. Like yours, it didn't look good. After the primer, I put on a single coat of latex paint. It still looks great 7 years later.

 

[NUTTSGT]

Um, that's why it is called PRIMER and not paint.
That stuff is excellent as a first coat on bare wood (or OSB), but yeah, that's what happens to it over time. Honestly, it's not so white to begin with.

Honestly, after two coats of Kilz, it was nice and bright white, that was one of the reasons I decided to leave it alone.

 

[rlitman]

Right, but primer has much less pigment than paint, and more of the binder.
That's why it soaks in so well, and holds on so well too.
The pigment is there to hide stains, and even the color enough so that it doesn't show through the topcoat, but it isn't sufficient to hide the yellowing of the oil base. That starts to show through eventually.

Really, with the cost of paints and primers balanced against the cost of your time to put it up, I always go for buying more paint.
When I did my son's bedroom, I used seven different types of paint (but aside from the 3 gallons of tinted paint, they're all stuff that I can use the leftovers across the rest of the house).
Oil based primer on the woodwork.
White gloss latex paint on the trim.
White latex primer on the plaster repairs.
One more coat of the same white latex primer on the ceiling (first coat over the repairs, second coat over everything to give an even base for the paint).
Tinted primer on the walls (walls were done in two tones of blue, but the primer was tinted to the lighter color).
Two types of blue for the walls.
White ceiling paint for the ceiling (ceiling paint is it's own animal too).

 

[olytdi]

I think you're supposed to paint over Kilz relatively promptly -- it's not made for exposure to the elements but to another coat of paint.

 

[NUTTSGT]

I think you're supposed to paint over Kilz relatively promptly -- it's not made for exposure to the elements but to another coat of paint.

I glanced over the directions last night for the heck of it, I missed anything about top coating it. I lived and learned, easily correctable.

 

[sselander]

Kilz is a shellac based primer, which would make sense why it turned yellowish.
As stated before, it is a primer and should have a top coat of paint over it.

 

[snorky18]

I'd still say it's a great product, you just discovered a limitation. We probably used 40+ gallons of it through an airless sprayer when we rehabbed a nicotine-smears-on-the-walls house.

Question: How do you know when it's time to replace the cartridge on your respirator while painting?
Answer: When you suddenly find that you can no longer stand b/c you are so lightheaded.

 

[NUTTSGT]

Picked up a gallon of Kilz Pro-X 170 semi-gloss just a bit ago and it will be going on today. Hopefully their paint is as good as their primer.