finding just the right glue

I'm working on a project that requires a glue/sealant that works with silver, gold, glass and photos... I started with silicone because it seals so well...  but it isn't an adhesive so it doesn't hold things together! so now I am trying several brands of glue. I've heard that there is a silicone glue out there, but I haven't been able to find it. who knew it would be so hard to both seal and stick something!?! there is a site that can help find the perfect glue called this to that (love the name) but sealing isn't one of the options...