I purchased a new 4 piece shower unit from Sterling. I drilled the wrong side wall. Now I would like to bond the whole with the piece from the correct one. What do I use as a glue.

Before you try to patch try calling Kohler and tell them your story. I wrecked a shower door track and they gave me a new one free. Plead dumb, it worked for me and I am only a little dumb. Sterling Plumbing: Bathroom and Kitchen Products, Shower Doors, Baths, Showers, Toilets, Bathroom Sinks, Kitchen Sinks (http://sterlingplumbing.com/home.strl)