i actually used thumb screws to hold everything together. if i needed to bond it, the two things I know that work. are epoxy(pain in the ***, takes some time to set). or plastic weld. if you goto a shop that deals with the selling of acrylic sheets, or maybe a hobbie store you should be able to find it. plastic weld is a thin liquid. when you put it on acrylic, and hold the acrylic together it actually melts and bonds the plastic together. When I owned a sign shop I used to buy mine at a place called konradi plastics. Somewhere out by portage indiana. im sure theres a place that deals in that kinda stuff out where your at. I also used to buy 4X8 sheets of acrylic, polycarbonate, etc.