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Food Safe, Heat Proof, Waterproof Ceramic Glue

04/15/2011 10:59 PM

I want to repair a teapot spout. Any ideas? So far I'm not coming up with anything. Thanks

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#1

Re: food safe, heat proof, waterproof ceramic glue

04/15/2011 11:24 PM

I don't know about "food safe".

This is a ceramic filled adhesive that may work. It may not be available to you.

Sauereisen - Adhesives and Potting Compounds

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#2

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 12:36 AM

Stop putting alcohol in the tea pot.

Just kidding Peggy. Quite frankly, plain old super glue will do the trick. Once it's dry, it's safe.

My personal rule, is to chew on super glue, don't drink it.

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#6
In reply to #2

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 5:10 PM

@Kramarat thanks for the laugh, I needed that this morning. Yeah, I've decided superglue is the way to go, specifically loktite 414, and I'll stop spiking my morning tea. (poot, busted) thanks to all of you for your input

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#7
In reply to #6

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 5:30 PM

I predict that if you use a CA adhesive, as you say, the teapot spout will eventually fall off into a cup of tea, or just fall off onto the stove in the not too distant future.

I would not recommend any repair using adhesives such as acrylics or epoxies for this application.

Sorry, but some things are just not meant to be. Treat yourself to a new teapot.

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#8
In reply to #7

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 5:44 PM

Hi Lyn Can you explain why? (I would love to treat myself to a new teapot, unfortunately don't know where I could possibly find one like this outside of NYC or S Francisco, it's huge... )

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#9
In reply to #8

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 6:10 PM

Well,

Couple of reasons.

There's a thing called thermal expansion that occurs every time something is heated or cooled. Ceramics are very stable and don't grow or shrink much when heated. Let's just consider heat here. We'll take some hypothetical expansion numbers.

Let's say a ceramic teapot expands .00005 inches for every degree of heat rise. It expands in every direction, but since it's consistent nothing happens. The adhesives all expand much more, say .0005 inches/ degree. As you can see this is an order of magnitude higher and so the adhesive always tries to grow much more than the ceramic. Eventually adhesive failure will result.

Now, lets consider moisture absorption. All polymers absorb moisture to some degree. Moisture doesn't cause any problem with ceramic, but it, too causes the polymer to expand. So you have a hot material that is expanding due to heat and absorbing moisture due to the humid environment. Think water and a dry sponge.

After a few hundred/thousand cycles the spout will go on it's merry way.

Sorry for the negativity, but I'm well known for it. We won't even discuss the health implications of something leaching out of the adhesive and into your water. Ceramic is inert, plastic isn't. I realize that the amount here is minuscule, but it should be noted.

Try it if you like. Good luck. Let us know how it works.

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#10
In reply to #9

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 6:29 PM

Excellent presentation Lyn. GA

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#11
In reply to #10

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 7:13 PM

thanks Lyn It's gonna be just for show then...

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#15
In reply to #9

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 12:29 AM

I had a filling come out a while back.. one of those kinds they cure with the UV gun... perhaps your answer is why it came loose?

chris

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#22
In reply to #9

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 12:46 PM

No!

You have obviously never used epoxy glue (properly!)

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#25
In reply to #22

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 1:03 PM

Do you have any clue about thermal expansion and moisture vapor transmission rates of polymers? I think not.

And, for the record, I somehow managed to fumble my way through 22 years as a materials (polymer) engineer of a major aerospace firm.

Your posts only confirm your ignorance of the subject.

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#26
In reply to #25

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 1:57 PM

having used vbarious epoxy glues for well over 50 years to repair many things, including a teapot, several car radiators, plenty of other ceramic things as well, boat repairs, car repairs.

I will be using it to make some special microswitch sensors in the next few days.....In fact I have simply forgotten exactly just how many things I have repaired with it.....

I have yet to see a bond come apart, unless fire was involved.....because I know how to prepare the surfaces correctly!! That is the basic "trick" in getting a good longlasting bond.

I still say that you are doing something wrong if your results don't stand the test of time.............

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#27
In reply to #26

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 2:49 PM

GA Andy, I was reading this and wondering why nobody had suggested using a two part epoxy.

I've had excellent results with it for all manner of ceramics, glass and other materials.

No problem with heat or moisture at all.

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#28
In reply to #27

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 4:58 PM

You're a pal, thanks.

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#34
In reply to #9

Re: food safe, heat proof, waterproof ceramic glue

04/18/2011 11:06 AM

"Moisture doesn't cause any problem with ceramic"

Are you sure about that...Most of all my experiences dealing with "Ceramic's" and ceramic failures, have been associated with fractures induced by moisture.

Would the thermal expansion argument also be true then for any of the glazes as well!

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#33
In reply to #8

Re: food safe, heat proof, waterproof ceramic glue

04/18/2011 9:55 AM

Try this solution!!!!

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#21
In reply to #7

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 12:45 PM

Super glue is not epoxy.

Epoxy can glue up to around 250°F and is not water soluble like super glue.

Epoxy is the right stuff to use.

Clean glue areas first with Meths/denatured alcohol.

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#24
In reply to #21

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 12:55 PM

Re-read the post.

I know the difference between epoxy adhesives and cyanoacrylate adhesives. Super Glue is a trade name.

Epoxy still absorbs moisture and expands with heat, and depending on the formulation used may be toxic. At least more so than acrylic adhesives.

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#3

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 2:23 AM

Hi Peggy,

Welcome to CR4 you came to the right place for help. You have to forgive kramarat he is just kidding. I think, but… from the looks of his icon, he just superglue his eyes together.

Check this out

http://en.wikipedia.org/wiki/Cyanoacrylate

Scroll down to Uses see paragraph 9.

And, kramarat if you were to chew on superglue you would not be able to eye or speech no evil.

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#5
In reply to #3

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 7:51 AM

I was joking around......a little.

Superglue works great on ceramic. As far as I know, once dry, it's non-toxic unless actually ignited, which is unlikely in this application.

As far as chewing the dried product...........that was true. Whenever I use it, I always end up with some on my fingers. The best way to get it off, that I've found, is to bite/chew it off. Just don't do it in public.

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#4

Re: food safe, heat proof, waterproof ceramic glue

04/16/2011 6:08 AM

Two-pack epoxy would be my choice.

Codey

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#23
In reply to #4

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 12:48 PM

GA

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#30
In reply to #23

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 7:21 PM

Like your subscript. I saw this originally (20 years ago) as "Six munce ago I couldn't spell ingineer, now I are one." This emphasizes the poor grasp of spelling and grammar that engineers are reputed to have.

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#31
In reply to #30

Re: food safe, heat proof, waterproof ceramic glue

04/17/2011 7:24 PM

lol, do I remember that one.

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#12

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/16/2011 10:28 PM
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#13

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/16/2011 11:33 PM

Go to a ceramic studio. Have them put it together with an appropriate glaze, fixture it and fire it. It will probably still show a line, but it will be all the same material and will not have thermal or moisture problems.

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#14
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Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/16/2011 11:40 PM

Another good suggestion from a newcomer.

Just downright logical. Ga, again.

Welcome to the forum.

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#16

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 9:55 AM

I used JB weld epoxy on a copper teapot my father has on the kitchen wood cookstove all the time and it has worked for years

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#17

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 10:58 AM
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#18
In reply to #17

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 11:02 AM

They have made fantastic strides in polymer chemistry lately, and the fix might work.

Peggy seems like an intelligent person (well, she did come here, didn't she?) and I'm sure she'll make an informed decision.

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#19
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Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 11:19 AM

I found that with ceramic, since it's porous, a method that works well is to put some superglue on each surface, (the liquid, not the gel), wipe it off, and let it sit for about a half hour and dry. Then come back and reapply a little superglue and make the repair. It seals the surfaces so that the actual repair application doesn't get absorbed into the ceramic.

I hadn't heard of this future glue. Sounds even better than the original. Porous, non-porous, hot, cold............could be the ticket.

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#20
In reply to #19

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 11:27 AM

There are also primers/initiators that can be used to "kick it over", too.

But, it's still a tough environment. Lots of thermal cycles and moisture.

Maybe Peggy will let us know how she does it.

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#29

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 6:49 PM
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#32

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/17/2011 8:33 PM

Peggy,

There are organisations out there that do restorations of antique ceramics.

Perhaps one of these could help you.

Regards

Bill

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#35

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/18/2011 11:09 AM

May not be heat safe, but would be waterproof and should be food safe.

http://solutions.3m.com/wps/portal/3M/en_US/3M-ESPE-NA/dental-professionals/products/category/cement/

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#36
In reply to #35

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/18/2011 11:31 PM

perfect! Probably costs way more than the teapot though... (and if my crowns fall off then I can use it for that too!)

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#37
In reply to #36

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/20/2011 1:26 PM

Just thought I'd give you your first official GA to welcome you into the fold! Looks like you are kind of fond of that there teapot of yours!

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#38
In reply to #37

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/20/2011 10:13 PM

why thank you Mr Truman Brain! Looks like I've landed into a land of mad geniuses... I'm enjoying the discussion immensely! And yes, I have a teapot collection, and this is my turquoise one, and current favorite. But it's gonna live on the shelf and look pretty except for rare special occasions, as it seems that according to you all nothing is really gonna work. Believe me, I do believe all of you know what you're talking about, (even if your eyes are glued together). :-) P

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#39
In reply to #38

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/21/2011 9:01 AM

BAHAHAHAHSHAahahahahaAAAAAAAAAAAAaaaaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrrrr

Go Peggy Go!

oops sry [patronizing] guys

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#40

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

04/12/2013 7:02 AM

This is a rather old thread, but who knows, someone may still look at this.

There are a lot of adhesives and fillers available, but most are on the commercial / industrial side of the marketplace.

There are few places available that deal in appropriate ones, and far fewer that might be prepared to provide very small quantities.

But, as mentioned, dentists DO use "foodsafe" and reasonably heat-safe compounds in small quantities every day.

I wonder what your friendly dentist would say to a request to do a small repair? If he was not too worried about setting a precedent, he might be amused at the idea.

Good luck!

MidAtlantian

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#41

Re: Food Safe, Heat Proof, Waterproof Ceramic Glue

06/25/2014 1:17 PM

There are food-safe ceramic glues out there! I'd definitely go with one of those. There's a list here:

www.gluehow.com/recommendation/ceramic/to/ceramic

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