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Thread: Heat Resistant Glue
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2nd November 2022, 09:12 AM #1
Heat Resistant Glue
Pictured below is a small, pottery casserole pot, which SWMBO tells me was a wedding present (I knew that ) so it is a little on the ancient side. The problem is, as you can see, that the lid has broken. She would like to use it as intended, in the oven, so to repair it any glue would have to withstand temperatures up to about 220°C but more often temperatures up to say 180°C.
I recently attempted to repair a loose handle on an air frier with epoxy glue: It didn't work and failed on the first use.
P1080493 (Medium).JPGP1080494 (Medium).JPG
Any suggestions?
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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2nd November 2022 09:12 AM # ADSGoogle Adsense Advertisement
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2nd November 2022, 02:15 PM #2
My only suggestion, and I don’t know if it will work. Is get someone that does pottery to stick it back together with clay, and re-fire the lid in a kiln.
Is there anyone in your area doing pottery or ceramics ?Brad.
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2nd November 2022, 02:57 PM #3
Someone close to me who does ceramics told me its doable. There is a product by Mayco, called Clay Mender. It will require re-firing in a kiln though. You will need to find someone who has a kiln to do a proper repair.
Brad.
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2nd November 2022, 06:08 PM #4
Thanks Brad for that possibility.
I am leaning more towards a quick fix, which of course may be foolhardy.
My limited reading is that there are often varieties of well known glues that have an additional additive which makes them suitable for hot situations. I think Loctite makw a product called GO2 gel, but I have not located it in Oz. Gorilla Construction glue may be suitable but I canot get confirmation for that. Various silicons have heat resistant properties, but they are more for sealing than gluing. For example, I have heard that race cars were somtimes assembled with silicon instead of a gasket.
I was hoping somebody has experience of heat proof glues.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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2nd November 2022, 09:32 PM #5
There is always the Kintsugi option - the traditional Japanese art of repairing broken, chipped and cracked pottery using lacquer and gold.
Perhaps a little extravagant though.Mobyturns
In An Instant Your Life CanChange Forever
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2nd November 2022, 10:52 PM #6
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2nd November 2022, 11:15 PM #7
I would be worried about going the construction glue route for two reasons.
1- the possible toxicity of any such glue when used in a vessel used for cooking your food.
2- if you try various types of glue and they fail, you have likely contaminated the broken surfaces, and then it may make the clay mender option a no go.
I would be talking to any pottery type people that are in your area, it could end up being the cheaper option. They might put it in the kiln when they are firing some other stuff if they have room.Brad.
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2nd November 2022, 11:16 PM #8
Perhaps one of the high temp epoxy putties may be suitable, the types that automotive stores typically stock.
Mobyturns
In An Instant Your Life CanChange Forever
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3rd November 2022, 09:37 AM #9Bushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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3rd November 2022, 09:59 AM #10
The Bundaberg Pottery Club is in the same craft center as our Woodworking Guild; if you can't get it repaired locally send it to me and I'll get it sorted.
From a brief look at "Clay Mender" the repair process is quite simple.Nothing succeeds like a budgie without a beak.
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4th November 2022, 07:19 PM #11GOLD MEMBER
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I’d add another negative to The two that Ironwood mentioned. Think about what happens if the glue fails while carrying a scalding hot pot from stove to benchtop.
Apologies for unnoticed autocomplete errors.
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5th November 2022, 07:55 AM #12
Arron
If it were the main body of the pot it would be a real concern, but it is only the lid that is broken. I am sure there would be a suitable glue, but the question of toxicity is slightly concerning , although again it is on the lid, arguably not in direct contact with the food and in minimal quantity being limited to a glue line. When we are considering food safe finishes, for example, we are debating an all over covering. However, poison is poison!
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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5th November 2022, 09:32 AM #13GOLD MEMBER
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My brother used to be part of a touring car race team back in the 80’s and 90’s and they used silicone fir gaskets in their engine builds
Not sure if that is a route I would take in your scenario though. I think the biggest issue you need to overcome is the different coefficients of expansion between the ceramic and the glue when subject to different temperatures
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5th November 2022, 10:01 AM #14
Beardy
I mentioned silicone in my original post and the use for head gaskets, but that is more for sealing than gluing as the head bolts keep everything in place. I have always assumed it was an easy way to raise the the compression ratio too on the race vehicles. differential expansion is yet another dynamic so a glue that remains flexible would be of benefit.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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5th November 2022, 10:23 AM #15
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