Originally Posted by Crane's
You won't find any super glue labeled as non toxic. Welcome to the world of legal CYA. The fact is that according to the MSDS ingesting it is more or less a non issue as far as poisoning is concerned. It's fairly common knowledge that the stuff was used by the military to close wounds among other things. Since it appears you have a crack I would run a small bead along the inside and outside and let it dry overnight. You can get rid of the excess with a razor blade if you wish.
There is a difference between commercial cyanoacrylates which are short-chain, and medical CA's which are long-chain.
Originally Posted by dopey
Elmer's glue is water-soluble, so it is not the most optimal solution for repairing a crack in your Arts and Crafts mug if your intention is to drink a hot beverage from said Arts and Crafts Mug since the glue will dissolve when it comes in contact with the liquid from your beverage which will have the effect of undoing the repair to the crack in your vintage Arts and Crafts mug.
Originally Posted by Lafont
Okay - I went around to a number of businesses - home store big-box chain, small hardware, crafts big box, kitchenware, kitchen supplied (just a phone call or two), etc. My criteria was: 1) non-toxic, can be used with food; 2) not water soluble; 3) can be used repeatedly with hot liquid. Also I didn't want to pay a lot and I didn't want the product to be visible. Saturday I went to a very good independent hardward store which had a product that appears to meet all
my criteria: DAP All-Purpose Adhesive Sealant. it is said to form "a strong waterproof seal," is "safe for food contact," and is "dishwasher & microwave safe." It's invisible, easy to apply, and more expensive (about $6.95 but I hope to use ot for other applcations as well). Illustrations suggest use for an aquarium and a ceramic cup (though other products have shown cup illustrations as well; that doesn't necessarily mean the product can be used where the cup meets with liquid; the glue might just be for attaching a handle).
Here's hoping this adhesive meets my purposes and I'm able to use the mug for a long, long time!
There is a number 1 rule of gluing stuff. And it is that your surfaces have to be very well prepped and not contaminated. At this point, I think you're toast, as liquid you drank (coffee) has wicked into the crack, now there's Elmer's in there. I probably would try and clean the crack surface very well, then let it sit full of water for a few days so that maybe it will wick in and dissolve stuff in the crack. Then I'd let it dry out for a few weeks before trying to glue it.
Good luck. I can't comment on if that is the right glue or not, but I will say that I remain dubious of it being a long-term solution.