I fix my hairline cracks in plastic tanks with a thin application of super glue on the exterior of the tank. And smooth it out with a toothpick before it dries.
Years ago I tried to rebuild Nautilus coils and I was looking for a way to block off the spare juice holes. Guess I went to all the same places as you with the same lack of success. Eventually I found some useful suggestions on beer brewing sites. There are silicon sealant products that are safe for full time contact with food which home brewers use. Silicon is good at handling heat as well.
Not sure how you would use it to seal small cracks though. You might need to completely cover the inside surface of the glass with a thin layer of silicone.
Every description I found that refers to the Iken tank material describes as glass of some type. I hope the epoxy works to seal it and prevent the cracks from growing.
In any case, it's great you already have plans B and C in place. Good luck!
Are there pics of said cracked tank?
Eventually I found some useful suggestions on beer brewing sites. There are silicon sealant products that are safe for full time contact with food which home brewers use.
That is what I am saying. Not everything we eat and drink come in perfectly molded containers. They attach bottoms, they put cap seals, etc.
Any chance you can remember what you used or where you went so we can have a reference and pursue this further?
Dunno why img is not showing. Here is the link: https://i.ibb.co/hCRd5yM/20211025-093228.jpg
Sorry, it's been several years and it's long gone. I got a small tube. All I remember is reading about it on a home brewing forum and ordering on-line.
Just saw your photo. I've had a few tanks with the glass enclosed in a metal cage like that. Presumably the cracks continue under the metal. Don't know about the structure above and below the visible glass, but if the leaking only comes out in the window part and not at the bottom of the metal cage I guess you could glue or caulk it on the outside rather than the inside. That way there would be little or no contact with the juice inside. And hopefully that would stop the cracks growing.
Good luck
This does not feel like glass to me. But it is nto important
An easy way to tell if that Tank is Glass or Plastic is to touch a Soldering Iron Tip to a Non-Cracked portion of the Tank.
If it is Plastic, it will Melt. If it isn't Glass, it Won't.
But that's not a good idea in the context of the OP's situation, assuming it is plastic.
I find that a light rap up against the bottom of one of my front teeth reveals if something is glass or plastic. Glass has a bright feel/sound whereas plastic has a dull feel/sound.
Thanks zoiDman and UncleJunkle.
Yes I get the point about using a soldering iron to fix plastic. Someone else also suggested, it makes sense.
Here is another tank: https://ibb.co/TrmpnD9
These tanks are not roughly handled. They were used only inside my home. I also use few flavours (Hangsen Arabic and TFA Vanilla), no tank crackers. I don't know if Acetyl Pyrazine cracks tanks, though. I add 1%.
Actually, I had many other tanks, too. IKEN is the only one that cracks. And all my IKENs are cracked.
I will experiment with soldering iron on some spare tanks from Vaporesso NGR-X. Then check on one of IKENs.