I normally use Aleene's, Fast Grab, Tacky Glue to edge glue my Intarsia pieces together as I sand them; I use it because it grabs fast and doesn't have the tendency to squeeze out as I place the pieces together. And then, when I fasten the whole Intarsia down to the backer, i use either Elmer's Yellow glue or Titebond lll. And, the reason is: it flows easy and doesn't grab as fast; giving me time to place glue on both intarsia and the backer.