Mold killing primer

[elcam84]

There also used to be mold inhibitors that you could add to your paint. Came in a small pouch. Haven't seen it in a long time though. There was also another additive by the same company but I can't remember what it is anymore.

Shellac is great for blocking stains and promoting adhesion but it's pricey and it does go bad when a year or so old. (Date code on bottom of can)
As for semi gloss I feel the same way unfortunately though the previous owners of our house painted all the walls in it. Lots more work and $ to get it prepped for paint as you can't paint directly over gloss paint cause it won't stick.

[GPW]

One of the tricks we used in the Past for stain blocking after mold remediation was good old Aluminum paint , either brush on or spray can ... That formed an effective barrier to paint over .. worked 100%
You have to remember , the Old Timers loved using Aluminum paint .... Likely for a good reason ...

[Don L.]

I should have been clearer in my original post. I don't have an existing mold problem, I was thinking the mold killing primer would be good to put on freshly glued canvas, in place of the gripper primer. Heck, if it soaks into the fibers of the canvas and forever kills the mold, what could be better? The manufacturer says it kills the mold, not just mold resistant.
Just wondered if any one had tried it. I think I will get a quart and see what it is like. My concern is that is won't stick as well as the gripper.

[fm-usa]

I should have been clearer in my original post. I don't have an existing mold problem, I was thinking the mold killing primer would be good to put on freshly glued canvas, in place of the gripper primer. Heck, if it soaks into the fibers of the canvas and forever kills the mold, what could be better? The manufacturer says it kills the mold, not just mold resistant.
Just wondered if any one had tried it. I think I will get a quart and see what it is like. My concern is that is won't stick as well as the gripper.

Looks like it's time to TEST first.
Suggest: Gripper, canvas, 1 or 2 coats depending on saturation of mold kill primer.

I caught that you didn't have a mold problem, only preventing it.
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Here's a little FYI.
Back in the early 90's I had a customers garage that was finished to plaster board but not primed. That paper turned a light cardboard brown. I had trouble getting patching plaster to stick to it because the paper was powdering.
I did a test patch of Kilz primer and it also didn't stick well.
I always stock Tight Bond 2 in my tool bucket for repairs. My last resort was to mix a few ounces of TB2 in the Kilz and work it in. IT WORKED VERY WELL tho it took 2 coats due to the papers dryness then a 3rd coat of regular Kilz and lastly finish paint.
Only problem was that TB2 & Kilz wanted to set up quick so I had to add a little "Flood Floetrol" so I'd have more work time. It worked also.
Makes me wonder, did I invent "Gripper" first?

.

[Mary C]

guyes, I had a mold and mildew problem because I did not finish priming and painting my foamie. this summer I got not one bit of mold. I was not worried because I had finished priming and painting. I have lots of moisture in Ga and lots of mold and mildue in the air. The north side of everyones home in this area gets mold and mildew on their house. usually just a little spray with clorox and soap will wash it away. I got the mold because my canvas was open with just glue and that will grow mildew. now it is beautiful. You really shouldn't worry about it. Gripper works to fill in the canvas and will fill in little spaces to provide a nice smooth finish if put on heavy. just remember it is a thick medium to spread heavy not to paint. that is for your exterior paint.

Mary C.