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Old 03-18-2014, 06:24 PM   #1
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Default LEXAN-Hardtop-thickness

Where did you get your lexan? It's an odd size in sheet stock, what thickness?

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Old 03-18-2014, 11:52 PM   #2
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I got mine from MSC Direct, a friend had a work account on there, which gave discounted prices and free shipping on anything, so I got a 4x8 sheet of 3/32" to my door for like $68. You might be able to find it on mcmaster, or if you can find a plastics company local to you.

I think 3/32" is about the right thickness - any less and it will be a bit flimsy, any more and it'll be difficult to bend it to contour to the window opening without using heat, at least with the fiberglass top that I had.

Here's a pic from right after I finished building the racecar last year, before it underwent a season of trying to avoid panel-crushing out-of-class spec miatas... so clean at this point!!
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Old 03-19-2014, 12:33 AM   #3
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The first place I would start is the rulebook of your favorite sanctioning body.

I know most deal with replacing the windshield and/or side windows, but it would be a good idea to see if the rear window is covered.
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Old 03-19-2014, 01:18 AM   #4
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I think I used 3/32" also. I just googled "lexington ky plastic supply" and found a place in town that had it in stock. They even cut it to size so that I wasn't paying for more than I needed. I'm not sure how many other locations they have, but General Rubber and Plastics is the name of the place.
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Old 03-19-2014, 01:23 AM   #5
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I used 1/4". It is over kill, but easy to use still. 3/32" sounds like a winner.
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Old 03-19-2014, 01:28 AM   #6
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I used 1/8"
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Old 03-30-2014, 07:32 PM   #7
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Good info, thanks for the posts. Mcmaster has been killing me with shipping, will have to investigate other sources
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Old 03-30-2014, 07:57 PM   #8
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I pick up from a place called Piedmont Plastics on the north side of Charlotte, NC. They supply quite a few of the NASCAR teams.
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Old 04-02-2014, 03:00 PM   #9
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We use .187" front and .125" rear. Hard coated polycarbonate that can be washed like normal glass

Miata Windshield
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Old 04-03-2014, 11:04 AM   #10
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Can you make two rear windows from one 4x8 sheet? I have a friend that's willing to split to cost with me if we can both use it.
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Old 04-03-2014, 12:31 PM   #11
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1/8" on the rear works fine. It moves around a bit at high speed but it's not an issue. Doesn't need to withstand any impacts.
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Old 04-03-2014, 04:50 PM   #12
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Is it possible to glue the front lexan windshield in place like a factory glass windshield. I sure would hate to drill holes in my windshield frame.
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Old 04-03-2014, 08:42 PM   #13
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Quote:
Originally Posted by jj1000 View Post
Can you make two rear windows from one 4x8 sheet? I have a friend that's willing to split to cost with me if we can both use it.
yes. I had a 4x8 sheet, which I cut an s2000 rear window out of, as well as a spare s2000 window. I then cut the spare s2000 window down to size for my miata. So it shouldn't be an issue getting two miata windows out of 1 sheet.
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Old 04-03-2014, 09:26 PM   #14
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Getting a 60" wide sheet is the trick
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