Best glue to attach glass to glass?

Glue E-6000. Very durable.

They make a two-part epoxy for that. Home Depot, follow the directions.

E6000

I use E6000 glue.

e6000

E6000

E6000 or Gorilla Glue!

Try e600 glue.

Hi Gigi: I've had a lot of success with Loctite glass glue. It's water and heat resistant, which is something you may want if it's for something you want to put outside. Just know that you have to sand the things to be glued, both surfaces, so that the glue has something to adhere to. Otherwise, whatever you glued will eventually fall apart. Here is a neat site that you might want to check out:) http://www.thistothat.com/ Good luck

Supertite has some great glues that are cheap and non toxic - https://supertite.myshopify.com/collections/hobby/products/1139?aff=8