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Lapidary / Gemstone Community Forum
June 17, 2019, 12:35:08 am
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What Kind Of Adhesive To Glue Two Cabochons Together?

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Author Topic: What Kind Of Adhesive To Glue Two Cabochons Together?  (Read 390 times)
James D. Farrow
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« on: July 16, 2015, 05:09:17 am »

What kind of adhesive is the best to glue two cabochons together?

Some kind of epoxy?

Thanks!

James
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James D. Farrow
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"No more trains will be sold once the magazine leaves the station"

bobby1
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« Reply #1 on: July 16, 2015, 07:02:38 am »

Epoxy 330 is what I use almost exclusively for these situations. I don't often glue two cabochons together but I do often glue quartz, opal or agate and basanite together to make doublets or triplets. I don't use the super glues because over time the adhesive breaks down. A few years ago I read an article written by the Smithsonian Institute regarding their experience with the super glues. When it came on the market they adopted it for antiquities restoration because it sped up their assembly of broken pottery or glass objects but they noticed that after a few years (7 to 10 years) that the adhesive bonds started to fail. When they were using the epoxies this didn't occur. Super glues tend to deteriorate over time in the presence of moisture so they went back to using epoxy.
I don't use the 5 minute epoxy either because the working time is so short you don't have time to work all of the bubbles out before it starts to set.
Bob
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lithicbeads
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« Reply #2 on: July 16, 2015, 09:20:48 am »

5 minute epoxy is totally inappropriate as it always has a bit of mobility , it stays flexible to a small degree. Hxtal is an  excellent alternative  but it is more expensive. For most 330 has been the standard.
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55fossil
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« Reply #3 on: July 16, 2015, 01:46:18 pm »

Epoxy 330 is my only glue. I use it for doublets and triplets. It is glass clear and works great.

Warnings; 
Drying time varies depending on he mix the two parts. 
Bubbles form in the epoxy when you mix the two parts. You need to  make certain and let the bubbles rise to the top and squeeze them out when you put your pieces together if they might show through.
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James D. Farrow
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« Reply #4 on: July 16, 2015, 02:59:46 pm »

Thanks Everyone!

Epoxy 330 it is.

James
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James D. Farrow
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southerly
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« Reply #5 on: July 17, 2015, 07:04:03 am »

Yep epoxy 330.
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