Our good friend and long-time ArtResin artist, Jeff Turner, showed us this glue that he uses to mount his photos to wooden panels prior to using ArtResin:
Lineco's Neutral pH Adhesive

It works great and doesn't have cheap fillers or diluents it, which often give off noxious VOCs. In addition, the drying time for this product is just right—not too quick, not too long.
Archival Quality.
We always appreciate any insider artist's tips! And we love spreading the news!
May I suggest purchasing this on Amazon... it's definitely available there (as most things seem to be), and it ships quick too.