Picture of concrete sink
This is my latest work, bathroom makeover. It is a wide sink (60cm x 40cm) with lots of space underneath.
The total cost is under 70 euros
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Step 1: Clean area first

Picture of clean area first
First i removed the old furniture and sink and then cleaned all the area from any residue (glue, dust, etc)
Once area was cleaned i did all measurements and calculations for all the ingredients and tools that i would need. 

Step 2: Ytong and glue

I started the construction with ytong blocks. In order for them to stand and tick together i used ytong adhesive. The blocks i used are 60x25x5 at the base and some for the vetical panels, 60x25x7.5 at each side and 60x25x15 on the top. http://www.instructables.com/id/concrete-sink-123D/

Step 3:

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this is a fortified with cement area for the faucet

Step 4:

The entire surface has 2cm concrete fortified with iron net. In the sink i left a hole for the drain.
It takes more or less one day to get completely dry.

Step 5:

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When the concrete was dry i smoothed all the surfaces and insisted on the edges

Step 6: Cover all surface with white concrete

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I used white concrete mixed with resin for more strength and tolerance to cover the entire constuction. It dries fast, and once dry again i smoothed it all.

Step 7: Resin concrete

Picture of resin concrete
I removed all dust very well, insisted on the details and i used matte sealer for water protection. http://www.instructables.com/id/concrete-sink-123D/
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angelopoulosk2 months ago

Πολύ καλός!

azeryth5 months ago
I am in the process of building a green home and concrete for my counters was my first choice. However, after getting quotes for around 5k, when granite would only cost me 2-3k, i decided to do it myself. This method of using concrete stones as a base intrigues me. How has it stood up to time? any cracking or anything you would change if you have to redo it?
BFTrailrun6 months ago

Thanks for the inspiration. Your instructable worked very well for us this far. We won't custom make the sink, though, but put a tone/terrazzo sink on top, though. Bit easier, thus...

nucethecrowd.11 months ago

1 year after the construction, is it still holding up ? Any damage on the white cement ? Any need for a second hand of matte sealer ?

csirna1 year ago
Hi, very nice work. I'd like to try something like this.
for the last step you did mix white concrete with epoxy resin right?
could you please explain this part in detail? (which percentages, how much time does it take to harden...) I am a newby with concrete and resin...

Thank you !!
stathis stathatos (author)  csirna1 year ago
thank u,

as for the last step i did not use epoxy resin but only a common resin. 2 parts cement, 1 part sand, as for the mixture i always add the liquids as much as necessary without counting, but in general its 1/5 resin and 4/5 water.
It seems that Ytong is not easily available in the USA but that shouldn't prevent building something similar since it's the 2cm of concrete that is the working surface.

I too am curious about the resin in the concrete. In the USA we don't have this. It could be that we have the same kind of thing but with a different name. For instance acrylic is often added to concrete here. Would that be the same thing?

My big question is how do you make the concrete waterproof? I know that the romans used volcanic ash to make concrete watertight. I know that concrete pools use something to make them watertight but I don't know what that would be. I've heard of using fly ash in concrete but I don't know if that makes it watertight. I saw that you put a coating on the sink at the end, is that your method of waterproofing?
Use something like latex or acrylic as a binder. There are some great -ibles for making concrete roof. There is also a great research paper from Auckland University that explored the use of waste latex for binder in concrete construction. This is worth taking a look.
alffrey1 year ago
It would be really helpful if you could give the steps in detail along with proportions of materials in the mix. Steps like how you smooth out the concrete after it is dried or how you fortified it with iron net. Some of us are new to working with concrete and would really appreciate it.
Horef1 year ago
i always vote for beard.
rowinghome1 year ago
really great project. love the concrete. what do you use to get it smooth and not that "chalky" feel?
mdeblasi11 year ago
Can you estimate what it weighs, I have a somewhat old house (for the US) and do not know if the joists can take the load.
salado1 year ago
Awesome work!!
offtheline1 year ago
very cool! awesome work!
timfou1 year ago
Love this project. Bonus: TIL to always insist on edges :)
Bowtie411 year ago
Our local "Watering Hole" did the same thing with their floor and bar top in black for the floor,and black with pearl for the bartop a couple years ago and it's held up great with heavy daily use.
chuckyd1 year ago
Let us know in a year, or so, how it is holding up.
totszwai1 year ago
Any way to make it glossy smooth?
PetsLuv1 year ago
I love what you have done. It is very clever to have used premade concrete blocks and then you covered everything with your concrete/resin mixture. I love it and a person could do this in a weekend. Some of the other concrete projects are great but the others cannot be completed in a weekend. Great work!
dvawolk1 year ago
great work, man. How did you smoothed/polished it?
Very simple, sturdy, and a great look! 2 questions though. Where is the iron net(how or where did you install it)? And how much of a slope did you do for the sink bowl?
stathis stathatos (author)  HelmutHound1 year ago
you are right, u can hardly see the net only slightly in a couple of pics in step 4. its all over the surface under the cement. As for the slope is 5% more or less.
vanseremet1 year ago
This is not an ordinary concrete sink ..looks like a sculpture instead! Very nice custom work ! what kind of artist are you sir? I like your work very much. I would like to hire you to make something similar as a gift to my wife so please keep me informed about your hourly charge thanks in advance.
stathis stathatos (author)  vanseremet1 year ago
thank u kind sir!
alitasali1 year ago
very good work ...
did you use any iron bars under sink?
stathis stathatos (author)  alitasali1 year ago
no i did not use any, only iron net under the entire surface which u can see in step 4. the ytong resin connected perfectly the blocks and made them extremely sturdy.
stathis stathatos (author)  alitasali1 year ago
thank you very much
blkhawk1 year ago
Awesome! Now you have a nice permanent sink in your bathroom. Great work!
stathis stathatos (author)  blkhawk1 year ago
thank u!
great job, never seen a project like this, usually concrete jobs are done upside down to get a perfect flat topsurface.

Using th ewhite cement resulted in an almost ceramic like finish, great idea.
thank u for your comment,

i wanted to have a minimal more "zen" look, i hope i did get right!
pdrg1 year ago
Excellent result, appreciate you sharing it with us!
stathis stathatos (author)  pdrg1 year ago
thank u
vasdar1 year ago
polu kalo apotelesma file...o sundiasmos frape kai tsigaro otan ftiaxneis kati einai kathara ellhnikos:P
stathis stathatos (author)  vasdar1 year ago
euxaristw polu! anagkaio kako o sundiasmos!
zomfibame1 year ago
I like how the end result looks; it almost has an adobe look to it. I also dig the use of the "ytong" blocks for the underlying structure... (I've only ever seen it called thermalite).
stathis stathatos (author)  zomfibame1 year ago
thank u! ytong is a european brand for light constructions!
Hebert1 year ago
Congratulations turned out great
stathis stathatos (author)  Hebert1 year ago
thank you very much
Janes Tu1 year ago
this is totally awesome
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