Wall construction on lime-cement plaster (healthy for living / mineral)

I would rather recommend the questioner to paste a sturdy, washable wallpaper there.

Is "elephant skin" still available? It was used in the past.

Yes, it exists, but it shines in a strange way.

I still don't understand the connection with the original post,

Normal dispersion paint also works with a suitable primer. Mold formation comes from the Tikitaka wonderland. It has nothing to do with silicate paint. But I still don't understand why latex paint should be applied on top. Overpainting with dispersion silicate paint is fine.

Does dispersion silicate paint work on silicate coating without primer and is there any with abrasion class 1? The painter could have told me that. That would be great. Has anyone done this already and has experience?

Does dispersion silicate paint work on silicate coatings

Assume that you previously also applied a dispersion silicate paint. Pure silicate is hardly encountered anymore due to the application process. I would just paint. I can't say anything about the abrasion classes.

Has anyone done this already and has experience?

No problem on facades.

As far as I know, it is pure silicate paint. The walls were previously plastered and then painted with silicate paint. The painter left me a jar with the paint back then, and it became solid and unusable after a short time.

I still don’t understand the connection to the original post, but okay. Good silicate paint with wet abrasion class 1, paint twice and then enjoy it for the next few years. No idea why anyone would want to seal the wall with latex paint and what that has to do with healthy living, etc.

That’s how it should be and no other way. In my opinion - pardon my French - latex paint is the absolute worst and nowhere near as easy to maintain as you might think. I know someone who had washable latex paint applied up to about 1.20 m height in a heavily used stairwell, and it was a complete disaster. It looks ugly and is harder to clean than the dispersion silicate paint applied on the upper part. We also once painted a small section of wall in an awkward spot in an old kitchen (where there really should have been a tiled backsplash) with latex paint in the hope that stains, splashes, etc., would be easier to clean off. The opposite was true here as well. Tomato sauce splashes immediately soaked in and left pink stains that couldn’t be removed. If you scrub too hard, you damage the surface and it starts flaking off in small crumbs. I can only strongly advise against it.

Thanks. Actually, wouldn’t it be easier to work a plaster fleece directly into the silicate filler and then paint directly with silicate paint... Why is that done less often? That would save the step of priming and sticking the painter’s fleece.

As painter’s fleece, I would prefer glass fleece. Cellulose fleece is probably more sensitive to moisture/mold, or am I mistaken here?

I would be interested in the answer to this question too. In our old apartment, we did exactly that. Fiberglass mesh plastered in, mineral primer, and then dispersion silicate paint. Visually much nicer and more high-quality than painter’s fleece, and excellent indoor climate. In our current (interim) apartment, the landlady had painter’s fleece applied and in our opinion, it looks terrible. Every drill hole remains visible forever and the walls absorb moisture much worse. To put it bluntly, it feels like the wall was wallpapered with plastic bags. Why someone would actively choose that is not clear to me. I assume lower costs, less effort, and easier to apply.