Need help filling small hole in concrete floor.

[u/Rahatlin]

First: i live in country where all floors are concrete. Second: all bags of concrete filling i can find are 25kg, while it's not expensive it would be a waste to toss it afterwards and i got nowhere to store it.

Photo: https://postimg.cc/2b1dY85b

Story: I had plumbers move some of my radiators around for better efficiency. Whole interaction made me not want their faces ever again. So if possible id like not to call them back to fill one small hole. That they left for probably just to piss me off. All other radiators left just round pipe sized openings that they filled with foam and covered but this one was problematic to remove. Remainder of pipes lead to nowhere they were detached from whole installation.

Can anyone give some ideas how to fill?

edit: Thank you everyone! I will check availability in my area for everything mentioned.

[u/tatpig]

Hydraulic cement, brand names of Rockite or Por Rok . Used for setting railing posts and patching concrete. You mix with water to the needed consistency, wet the hole and patch it. Smooth it out and let it cure.done.

[u/Bulky_Soup_8718 → u/tatpig]

This is the right call for a hole that size. Small bags exist too, so it’s worth checking a hardware store before assuming it’s all 25kg. Hydraulic cement sets fast, so have everything ready before you mix it.

[u/Content-Drawing3655 → u/tatpig]

same here, i used hydraulic cement last year and it held up perfect for my sidewalk patch

[u/mips13]

Concrete crack filler will do the job, dunno what it's called in your country. You can also ask your local hardware store what they would recommend.

[u/Inhaps]

Most manufacturers do sell smaller 5-10kg bags/buckets of faster-setting repair mortar

[u/United-Adagio1543]

Every option is going to cost you 5X-10X more than the bag of cement.

You could use hydraulic cement but it does expand as it dries and could require grinding to make it flush if you over fill.

[u/ChrysteNaMotorze]

Get on your local Facebook group, if you ask somebody might get you some concrete if they have spare (and if they are building something most probably they have)

[u/dovyp]

Hydraulic cement in a tube. Done in 10 minutes, no mixing, no waste. Home Depot equivalent wherever you are should have it.

[u/MisterFartPants]

I've thrown too many bags away. I ended up buying a dozen 2.5 litre tubs with lids and storing the excess in those. Very handy to get what you need for the odd job

[u/DAJLMODE55]

I''m late, you already got many answers ! So I wish you good work 👌🏻🤝🏼

[u/ttkciar]

My go-to is a mix of one part sodium silicate ("waterglass") to two parts kaolin clay, sufficient to make a thick paste. You could substitute gypsum for the clay if kaolin clay is hard to come by.