What's the Hungarian equivalent of polyfilla?
Below no doubt needs mixing up water. Not a problem.
https://www.obi.hu/gipszkartonlap-tartozekok/knauf-uniflott-hezagkitoelto-anyag-5-kg/p/1135169

I've always known Polyfiller as Glett over here.

https://www.praktiker.hu/search2/ind...e=48&pf-page=1

wot Sachina said.
I would add that there are several grades. the ones shown in the link show the recommended filling thickness for each type. You can also get a 6mm - 30mm which is good for thicker filling but is not as fine in the finish. However you can use 0mm - 10mm type for thicker finish but I have found it is better to do filling in 2 goes if the finer type is used for thicker fills, but it does save buying 2 types.
Once mixed it lasts 5 -10 mins before going off and after it has dried it can be sanded with 80 or 100 grit sand paper.
Classically in Hungary glett is used over render on internal walls in the same way that the skim coat of plaster would be used in the UK. In Hungary the glett coat is put on by the painter/decorator after the builder has done the rendering.
Glett is also used to tape and fill the joints when using plasterboard. (nobody skims plasterboard in Hungary).

Thanks for the above. Will be going to OBI today so will look out for the above.

Knauf is an Austrian company, active internationally.
Maybe their product site can help?
https://www.knauf.com/en/products-an...product-range/

I went for the easy option choosing Dulux multipurpose and fine filler.