For wood that is free of oil contamination, I have found that Titebond II wood glue gives a more nearly invisible joint than polyurethane or epoxy adhesives. Of course, initial fit is most important for an invisible joint. Scraps of walnut that I glued together and then clamped in a vise and smacked with a hammer broke through the wood rather than through the glue joint. That's strong enough for me. I've never tried CA on walnut because I've read that CA has a high tensile strength, but is not so strong in shear. CA's I've used on other items didn't have a very long working time either. How long is it for Zap-a-Gap?
