On Fri, 08 Apr 2011 13:03:57 -0700, JIMMIE wrote:
Superglue should hold tiles pretty good.

I've never had success with cyanoacrylates on (a) porous surfaces, and
(b) large surfaces.

The problem with cyanacrolates (e.g., superglue) is they the glue itself
is extremely weak. So, while the molecular bonding is fantastic, you
really want a single molecule layer thick of the stuff, no more, no less.

That's really hard to do on rough cracked chipped porous surfaces like a
clay tile, even a recently broken clay tile. So, from 'my' experience,
superglue would be one of the worst possible choices for clay tile.

Besides, we're talking a LOT of (what turns out to be expensive) super
glue! Even if it did work (which I really doubt it would).

But, not to sound condescending, I 'do' welcome the suggestions. I'm
particularly motivated now that you guys tell me roofers habitually glue
roofing tiles (I hadn't expected that).

Is there an epoxy that can set while I'm on the roof holding the tiles
(two minutes or so)?