What is a good way to do this?
I tried caulk, and it has not held up for a very long time. RIght now, my bathroom sink is just kind of sitting there.
I don't really think that this was a plumbing issue, so sorry if it is in the wrong section.
Glad to be here.
Try construction adhesive.Liquid Nails® - Wood Projects Construction Adhesive (LN-940)
You can install the anchor clips from the bottom side (assuming you can find and buy them separately).