Not sure, but there's a special aquarium silicone that's developed
for putting together/fixing fish tanks. I'd think it would be
non-toxic once it cures.

Marc


> > A friend of ours with a leaky concrete birdbath has asked for advice about
> > something non-toxic to birds to use in making his birdbath hold water
> > again. Is this a place I can ask for help about that? Does anyone know
> > what he could use or know someone else who might have an idea?
> >