Hi There! I use outdoor silicone adhesive for most projects...and mostly I do outdoor garden art. You can look up my post about 3 projects I just did, I have the tulip flower outside with a solar light in it...luv it! And I light up my pineapple every night, (it's sitting in my Art Room till I get some outdoor wiring/plug-in done) I personally wouldn't use welbond outside....

weldbond is a no-no for outdoors. GEII or any clear silicone will work for GOG outdoors as well as Lexel which is a type of silicone.
Wood is another no-no for outdoors, it will eventually warp and crack and your work will be ruined.
Nice to meet you and would love to see your work!

What WACKY said - exactly.

Yes I agree. Using silicone is a good idea for outdoor glass installation. I am in the tile business and I would also recommend a product called Durabond D-40. It is made to bond to glass tiles and can also be used for outdoor ceramic tile. If you have any questions please e mail me.

Here is a link that might be useful: Glass Mosaic Adhesives

Hi everybody. I used to be on here years ago under bianchi. Anyway. How about Liquid Nails. Would that work?

Yep. would work just fine.