Latex vs Oil based primer

by Rose
(Cincinnati, Oh USA)

Removing wallpaper and glue.... Now putting primer (Kills Premium - Latex) on the wall - BUT I've been told (by non-expert) that I need to use Oil based primer to hide any glue residue I might have missed.
What's the truth.



Hi Rose,

By using an oil (or solvent) based primer over a surface that has been wallpapered you will insure that the water-based glue doesn't bleed through your paint.

With that said, a latex primer like Kilz Premium is formulated to hide most (but not all) water based stains. Of course the only way to find out is to try the Kilz primer on at least one wall.

Once the wall is primed and dry check it for bleed through. If you do see stains coming through the primer you will need to re-prime the surface with an oil based primer instead of the latex.

Also, be sure to feel any bleed through that you see. If there is roughness then you will need to mud (then sand and re-prime) the areas prior to painting.

Shawn.


Comments for Latex vs Oil based primer

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Jun 18, 2013
Thanks
by: Anonymous

Thanks Shawn, The Kilz solution did the trick, it worked great. I really appreciate your feedback and comments.

THANKS again...have a great summer.

Craig

Jun 15, 2013
Painting oil primer onto drywall joints
by: Shawn

Hi Craig,

The reason I suggest the Kilz primer, sealer first is because it's the old joint compound that might be the issue. I'm thinking that the oil based Kilz will do the best job of sealing in the old joint compound.

If the area peals again, after applying the Kilz, new compound and more kilz, then you might end up having to re-drywall (or in the least remove the old compound).

There would be something totally wrong with the old joint compound, if after all of that work, it ends up pealing again.

I have seen plenty of paint directly over joint compound and have never seen it peal. Flashing on the other hand is normal (when not priming first) but not pealing. I'm not saying it wouldn't happen but it is a unique situation (to me anyways).

My guess actually is that the joint compound wasn't completely dry prior to being sprayed with paint.

I'm not sure though, so to be on the safe side I would think that a coat of oil based kilz primer, sealer would be your best bet as a starter coat.


Jun 15, 2013
Thanks Shawn
by: Craig

Sounds like a good plan. I've been procrastinating over putting on a skim coat of joint compound over the old stuff or going with a GOOD oil based over the old JC. It's definitely a garage not a man cave so although I want it to look good and since I can do a decent job of putting on JC I'll start with the oil based primer and follow your advice. Just curious but why oil base then a coat of JC and not a coat of JC over the old stuff and then the oil base primer?

Thanks again Shawn and I appreciate your reply.

Jun 15, 2013
Painting old Drywall
by: Shawn

Hi Craig,

It sounds to me that the issue is the previously applied joint compound and not the paint itself.

If you use a good drywall sealer your problem should be solved. The Valspar may work just fine but if it were me I would roll on some oil based Kilz first (the stain-blocking primer sealer kind) to the joint compound filled seams (or the areas that have pealed).

Once the Kilz has dried I would then re-mud the pealed areas so that the drywall surface is nice and level. Be sure to do any other holes or filling and caulking as needed. After the mud is dry, and it has been sanded, re-mud and sand the surface, Keep doing so until the walls are smooth and level.

You can now re-apply the Kilz to your repaired areas. Once the Kilz has dried roll on your Valspar to all of the walls including right over top of your previously applied Kilz.

Your now ready to pole sand the walls and roll on your two coats of paint.

Jun 14, 2013
Old drywall
by: Craig

I just had the floor replaced in my garage and since it's empty a new coat of paint is in order. Our house is 35yrs old and the garage was last painted 15 years ago when we bought it. The previous owner spay painted it to spruce up for the market. He sprayed it but as I prepped the walls found out he never primed the drywall. The paint he sprayed on peels right off the joint compound - only the joint compound it sticks to the actual drywall. I've spent the last couple of days scraping and peeling and now ready to primer and paint...my question is what's the best primer to use on my recently scraped off drywall joints and nails.? I did buy a latex Valspar primer sealer but hesitant to start. Thanks to all who care to reply.

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