Water Damage

Humble Abode

Can anyone reccomend a good latex primer for covering water damage, besides Bullseye 123?

ProWallGuy

Not too keen on using water-based for water stains. I have used Zinsser's GARDZ on occasion and it worked, but there were only small spots. The HD says Kilz2 will cover water stains, but....it is HD after all. Kilz2 is worthless IMO.

Per a search on Google, click here. Scroll down to CIL Professional Interior/Exterior 100% Acrylic Stain Bloc Primer Sealer. Never heard of it, but who knows, it might be in your neck of the woods.

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Wallpaper Hanger St. Louis
Digital Murals Installation

Exroadog

BM Freshstart

Humble Abode

The reason I wanted to use a water based is because it is 7000 square feet and if I use an oil on the water damage I have to use an oil on the whole job, and I prefer water based. As far as I know, and correct me if I'm wrong, it isn't a good idea to use a oil primer with a water topcoat.

Yea I'm not a big fan of the Kilz either.

Thanks I'll check into both products

George Z

You can use oil based or shellac based primer on waterstains only
and follow up with latex. If you are only using one finish coat, you
might have some flashing. Use an over all primer after your spot-prime
or two coats of finish. You can also use latex after an oil primer.
Before the acrylic super adherent primers, oil primers were used
all the time for oil to latex conversion.

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ProWallGuy

I would say it depends on the substrate and specs to choose good primer/finish combo. On exterior wood, where stuff flexes and moves with temp. change, go with oil/oil or water/water system. Interior and metals are more forgiving. Whats it going on?

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Teetorbilt

You may want to look into Zinsser B-I-N. It's shellac based and quick dry. I use lots of it and have had no problems with pain adherance. It's also good for sealing knots, cedar, redwood and as a primer/sealer for wallpaper.

Humble Abode

Interior plaster, very old. The problem that caused the damage has since been fixed, obviously, or I wouldn't be painting it.

Dale

.."no problems with pain adherance."
I know the feelin'...lol.

ProWallGuy

If the stains aren't too dark, I'd try to wash them down with a bleach solution (if feasible), and coat it with B.M. Freshstart or Perter's BlankIt. Both are acrylic, and have an ammonia odor, but cover well.

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Humble Abode

cool. yea I never even thought to wash it down. Thats a good idea.

ProWallGuy

If I considered using the water-based primer, I would definitely test drive a spot as soon as possible. Put a quick swipe of primer and finish over a stain, to see if it will bleed or not after drying, before I did the whole project.

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Wallpaper Hanger St. Louis
Digital Murals Installation

Exroadog

"very old interior plaster" if it has never been painted, your best off with oil primer. Then finish with latex.

Humble Abode

It's been painted before, probably several times. There's no bonding issues with oil to latex?

There is also a 3'x2' hole that needs to be repaired. I was thinking a masonry primer after it is patched, is that even nesisary?

ProWallGuy

No bonding issues with oil to latex.
Masonry primer would be optimum, but not entirely necessary. If the new plaster isn't extremely porous, then just double-coat it with whatever primer you are using.

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Digital Murals Installation

Dale

If you're going to use plaster for a patch use the right primer and make sure its dry enough to paint. Old plaster formulations used to need anywhere from a week or two up to a month to dry.

paintr56

Gripper from ICI. Make sure and let it cure twenty four hours before top coating.

Jim Bunton