Hi EdF, funny that this came up now. We've been busy the last couple of weeks installing Corean (sp?) window sills in a new office building, and had to deal with some cracks as the stuff doesn't bend very well at all. Luckily the supplier sent along a bonding kit that matched the material. I'd suggest looking up the manufacturer (either on the web or telephone) and surely they offer some kind of bonding kit (might not be cheap, but probably cheaper than a new piece). The corean we had to bond blended very well with the supplied kit and you couldn't tell there was a seam without looking very close.