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I would use 3M 5200 or better yet Locktite makes a construction adhesive called PL I think.

To answer an earlier question yes you can use the hone soaked.

How badly is it warped? If its a little you can lap it a bit. Lap it on wet and dry paper, the Norton stone is junk. Your first post said its higher in the middle. Like Utopian said you can just use...