Cracked bathroom sink repair?

[Bob Mircetic]

Hello all,

My bathroom sink has a hairline crack in it.  I noticed it shortly after we purchased the home 4 years ago.  Until recently, it was only a cosmetic issue, but now it has grown to the point where it will drip water through the crack.

Initially, I thought I would just replace it, but I'm not having luck finding one that's the same size.  As it's an undermount sink, the size of basin relative to the size of the cutout is critical.  (I'd rather not go to the trouble & expense of having the stone counter cut to accommodate a different size sink.)

Is is possible to repair this?  How would you handle this?
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Thanks,
Bob

 

[AlexThePalex]

You can seal the crack with a two part epoxy glue, and that will keep it watertight. For now.

But eventually the crack will become bigger due to heat expansion from the hot and cold water. 

I don't think you can stop this.

 

[chrisrosenb]

Coat the sink with Flex Seal.

 

[Mike Goetzke]

J-B Weld makes a 2-part epoxy called "Water Weld." Maybe attack it from the bottom with this. For the top maybe look into a refinishing kit?

 

[usernumber1]

the japanese have a philosophy and a technique but you're supposed to use gold
https://en.wikipedia.org/wiki/Kintsugi
https://mymodernmet.com/kintsugi-kintsukuroi/

I'd replace it personally, maybe a rectangular vessel sink can cover the existing opening
https://www.google.com/search?q=rectangular+vessel+sink&source=lnms&tbm=isch

 

[mkasdin]

the japanese have a philosophy and a technique but you're supposed to use gold
https://en.wikipedia.org/wiki/Kintsugi
https://mymodernmet.com/kintsugi-kintsukuroi/

I'd replace it personally, maybe a rectangular vessel sink can cover the existing opening
https://www.google.com/search?q=rectangular+vessel+sink&source=lnms&tbm=isch

that’s a good idea. I would R&R the old sink, it’s not worth redoing the repair in the future and the porcelain is worn.

 

[Stan Tillinghast]

I attempted a repair with epoxy in a sink repair kit; it works but looks awful. I just couldn’t smooth it out.

 

[DeformedTree]

I attempted a repair with epoxy in a sink repair kit; it works but looks awful. I just couldn’t smooth it out.

Can you find any manufacture information on the sink bottom to try and track down a replacement? If it's made from a Name brand, those companies can generally get you just about anything even if pretty old as they often make the same thing for decades.  If it is no name, "sink of the month" type deal, then ......time for that bathroom remodel you haven't even started dreaming of.

 

[Dane]

Make a new one:

 

[Roseland]

I'd be tempted to use a liquid acrylic sealant to seal the crack from the top, and reinforce the underside with fibreglass; you don't want a basin-full of water ending up in the cabinet below if the plug hole drops out completely!

Andrew

 

[kevinculle]

That sink isn't just cracked, the cracks have propagated to the extent that the drain plumbing is likely all that is keeping the bottom from falling out.  Your time would be better spent in finding a compatible replacement than trying to patch it up.