ᐅ Sealing a screed test point—how and is it necessary?

Yes, it is definitely recommended to fill the holes. Either – as @Scout already mentioned – you level the surface and simultaneously seal the measuring points, or you buy a small bag of screed concrete at the hardware store and fill the holes with it. Your choice.

We just had a thread about this recently ;-)

pagoni2020 schrieb:

Something in there, chewing gum or amalgam could also be an option

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Many answers, but none usable.
Hello questioner.
At the hardware store, there are also smaller containers of cement-based repair mortar. Maybe a floor installer you trust still has a small amount of filler material left. Mix this with a little water so that the mortar remains easy to spread, then press some mortar into the opening and smooth off the rest flush with the screed surface.
If there are any "bumps": sand them down with coarse sandpaper and vacuum up the dust.

KlaRa schrieb:

Many answers, but none useful.
Hello, question asker.
At the hardware store, you can also find smaller packages of cement-based repair compound. Maybe a flooring installer you trust still has a small leftover amount of filler. Mix this with a little water so the mortar can still be spread easily, then press some mortar into the opening and scrape off the excess flush with the surface of the screed.
If there are any "bumps," sand them down with coarse sandpaper and vacuum up the dust.

Great! Thank you very much for this answer

Otherwise, just a filler compound. There is also a type of tube with ready-to-use painter’s filler from Moltofill. That works as well. Otherwise, you can use some tile adhesive, grout, or something similar. If the surface is still uneven, get a sanding pad.

BBaumeister schrieb:

Otherwise, just use a filler compound. There is also a type of tube from Moltofill with ready-to-use painter’s filler. That works as well. Alternatively, some tile adhesive, grout, or something similar. If it’s still uneven, get a sanding pad.

Is it possible that there are filler compounds both for walls and floors?
With completely different material properties?
And that the recommended "painter’s filler" is a filler material intended only for ceilings and wall surfaces?
So what do you actually recommend?
Answer: An auxiliary material not suitable for floor surfaces!
Do you want the building owner asking here to end up in trouble because of these unqualified statements?
If you don’t know something precisely, you should not stand out by giving potentially damaging advice.
Everyone asking questions in this forum has the right to correct information.
Otherwise, a disclaimer should be added such as "... I think this might be correct."