OK, all you chemistry and constructions dudes and dudettes out there, I need a little help. I am at the point in my kitchen renovation where I install the breakfast bar. Here's the situation: Firstly, the countertop and breakfast bar are butcher block maple finished with water-based polyurethane. Secondly, the brackets are stainless steel Federal Brace Enterprise style. Thirdly, the brackets will be secured to the countertop with the recommended bracket kit (3/8" bolt and 3" backing plate. Fourthly, I don't want to use screws to mount the breakfast bar to the bracket if I don't have to. Lastly, that leaves me looking for the right adhesive/epoxy if one exists. Any suggestions?

I thank you in advance for the help.