Safe Adhesive?

I would think you could look up that info online. I will tell you however, that being involved in the semiconductor industry, things like this are an everyday occurrence for me. MOST of these things out-gas!!! Don't know if the out-gassing would be dangerous and/or how it would react to the chemical composition of our coinage, but you will be hard pressed to find something that doesn't.

One of the few things we are allowed to use inside of a class one mini-environment is a two part epoxy because when it hardens, it either stops out-gassing or it is very very minimal. But I think Biokemist would have to confirm that as I am certainly not a scientist by trade.

Plus, I don't think you want to be mixing epoxy anywhere close to a coin. lololol.

Actually, I wonder if Hadley knows of some AT coins that have been done by being near things like superglue in a closed environment. Regardless, just my Two Cents for ya.

Muckeye,
are you aware that adhesive 2x2s are available? They are more expensive than stapled 2x2s but the adhesive should be safe for coins.
http://cgi.ebay.com/50-Supersafe-Se...rs_W0QQitemZ a href= https://www.coincommunity.com/go/link.asp?target=https://www.ebay.com/itm/-/110096766704 target= _blank rel= nofollow 110096766704 /a QQihZ001QQcategoryZ39476QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

Well OldDan, I would have to say I am pretty confident of their inert qualities. The adhesive used in 2x2s is a pressure sensitive adhesive (post-it notes, band-aids, tape) not a drying or curing adhesive(super glue, contact cement, epoxy). It is the latter group that is known for offgassing, not the former.

I have some wheat ears I purchased as a kid over twenty years ago, placed them in adhesive 2x2s, and they are still as BU red as the day I purchased them.

Let me start by saying that I do not have a clue on that one, but I will try to do some research to see what I can find.

From an economical standpoint, how many 2X2's are we talking about here that you want use this method on? I have to believe that the time it would take to perfect this paste without damaging a coin in the process of putting it into the 2X2 may outweigh the cost of purchasing the self adhesive 2X2's. Just my opinion.

As a side note, I need to buy some supplies sometime soon. If you want me to order some extra stuff for you from the states and ship it to you to save some money, let me know. I'm not sure if I will buy any this week, but I may put in an order this weekend.

Not sure why you would want to spend the time putting glue on each 2x2 anyway. I've used thousands of 2x2's and if I glued them I would be doing that for many years compared to a stapler.
As to utilizing any glue, note the hardening and adhering of a glue to a surface is depending on the expolsion of a material in a gasious form. Why so many state on the tube, bottle, can, etc. to use in a well ventilated area. If this substance emitted from the glue can not escape in one direction, it may turn towards your coins. Further most glues contain numerous different materials which sometimes are and are not always on the lable since they are proprietary and part of a secret substance by the manufacturer. Disclosing such substances would restrict their availability to be separate from other glues and numerous cheaper copies could be produced. Even a glue that you think you know what it is may have had the chemical formulae modified numerous times to fool the compitition, so to speak. Epoxies being made to harden in seconds, minutes, hours, etc. have different substances in them in order to perform such tasks.
Summation is avoid gluing a 2x2 with a coin in it if at all possible. May as well just tape the edges if you want to seal it from possible air leaks.