Question, why a flexible putty, so you can remove it later? You want something that will stick to the birdbath but allow you to take it apart later?

Yes, but I'm not totally opposed to the idea of just gluing it on permanently. If I could take it apart it would make it a lot easier to store in the winter and pack when I move.

How heavy is the bowl? I am skeptical that a putty product will be able to withstand being hit by a dog or something.

If the surface is not porous, how about trying hot glue. You'll need to buy a heat gun, but if you have one already, you can run it out to the yard. The heat glue can be removed with some rubbing alcohol, assuming the finish on the bird bath isn't affected by alcohol (see video).

http://www.youtube.com/watch?v=dNNqSXgj6DE

Paul

That's a good idea, I didn't even think of using the glue gun.

I agree with lascatx, just buy some silicone or acrylic latex caulk at the hardware store and apply in a bead around the bottom of the bird bath top. I would keep the bead close to the edge, so that if/when you want to remove the top, you can insert a blade and slice away the caulking.

I wonder about the ceramic - is it smooth and slippery? If so, it could be difficult for the birds to use the bird bath, because they can't get a grip on a surface that is smooth and slick.

We did the caulk thing. Came apart. Set everthing up in the garage, basin face down on the floor, leveled it to be level with the floor. Set pedestal on basin, leveled it and marked it. Applied caulk to basin, set pedestal down. Applied bead of caulk around the outside edge of pedestal. Allowed to cure 36 hours. Came apart during install in the yard. Now must clean off caulk, allow two days to dry, then glue with something, not sure what yet, that's why I'm here. May try rope caulk.

If you want it permanently attached, put a dollop of liquid nails on and let it thoroughly dry - 24 hrs. Put it on top of the stem and make sure there is enough to come in contact with the bottom of the bowl.