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<blockquote data-quote="QtrHorse" data-source="post: 1650120" data-attributes="member: 567206">Lexan/ polycarbonate will flex much more than plexi. Lexan/ polycarbonate is a much softer material but has more strength when it comes to shattering, that&#039;s basically the only difference. I don&#039;t see how a 3/4 pc of plexi will flex in the size he stated. I have been in the sign industry for the past 10 years and have worked w/ both of these materials. I now sell sign supplies and am very familiar w/ both of the items being discussed.The plexi will be more rigid than MDF in that thickness and size. I would personally get some good 3M double sided tape (3M part number 4910 = water clear tape or 4929 = black tape) and use that to mount it to the top of the box. Both of the part numbers that I listed are very high bond tapes that will not dry rot. You do not want to use a basic foam tape, because it will get brittle over time. These tapes will also form a air tight seal, if applied correctly. You would then to drill a lot of holes and use screws. As stated already, make sure you use a sharp bit and be carefull when exiting the plexi, that&#039;s when it will crack or splinter.Just to give you an idea, A 4x8x.750 sheet of clear plexi will cost you roughly $475. That&#039;s what the company I work for sells a full sheet for. You may be able to find a sign supply company that will cut a pc for you but you will pay much more for it.</blockquote>

[QUOTE="QtrHorse, post: 1650120, member: 567206"] Lexan/ polycarbonate will flex much more than plexi. Lexan/ polycarbonate is a much softer material but has more strength when it comes to shattering, that's basically the only difference. I don't see how a 3/4 pc of plexi will flex in the size he stated. I have been in the sign industry for the past 10 years and have worked w/ both of these materials. I now sell sign supplies and am very familiar w/ both of the items being discussed. The plexi will be more rigid than MDF in that thickness and size. I would personally get some good 3M double sided tape (3M part number 4910 = water clear tape or 4929 = black tape) and use that to mount it to the top of the box. Both of the part numbers that I listed are very high bond tapes that will not dry rot. You do not want to use a basic foam tape, because it will get brittle over time. These tapes will also form a air tight seal, if applied correctly. You would then to drill a lot of holes and use screws. As stated already, make sure you use a sharp bit and be carefull when exiting the plexi, that's when it will crack or splinter. Just to give you an idea, A 4x8x.750 sheet of clear plexi will cost you roughly $475. That's what the company I work for sells a full sheet for. You may be able to find a sign supply company that will cut a pc for you but you will pay much more for it. [/QUOTE]

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