If it is crash glass on glass, silicone will work fine.

No.its crash glass on wood.

I have heard many members give advice against wood as a substrate as it swells and would eventually ruin your table. They often advise replacing the top with hardibacker or glass as either will take the elements. I'm sure some will pop in with some suggesions. Good luck

Kat

I would use the glass since your crash glass is most likely clear and it would look better in your finished project. As for what to use to adhere it I think I would ask this question on the stained glass and mosaic forum. I know that there are several people over there who have done things with the crash glass and they would be able to give you a good answer.