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Unread 11-05-2012, 07:53 AM   #1
johny84
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Multiple cracks in TJ hardtop

So, I have multiple cracks in my hardtop, just above the driver seat. Is there a way to fix it at home ?
It makes driving in the rain very annoying, since i'm getting wet whilst sitting in the car

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Unread 11-05-2012, 08:47 AM   #2
TheBoogieman
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http://www.jeepforum.com/forum/f96/f...rdtop-1288452/


http://www.scribd.com/doc/102634982/...ing-Top-Repair
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Unread 11-05-2012, 01:37 PM   #3
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Bondo Fiberglass resin jelly. Easy for hardtop DIY repairs.
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Unread 11-05-2012, 08:45 PM   #4
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Originally Posted by blubaru2002 View Post
Bondo Fiberglass resin jelly. Easy for hardtop DIY repairs.
You should read the second link. Hardtops on Jeeps are not made from fiberglass, they are SMC and require a resin other than the polyester that is used on conventional fiberglass work if the repair is structural.
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Unread 11-06-2012, 07:42 AM   #5
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Originally Posted by mrblaine

You should read the second link. Hardtops on Jeeps are not made from fiberglass, they are SMC and require a resin other than the polyester that is used on conventional fiberglass work if the repair is structural.
I am aware that the hardtop is made of SMC and not fiberglass. I opted to use fiberglass anyway when I repaired my hardtop. It has held up fine. I suppose only time will tell.



image-1378823673.jpg



image-1337507674.jpg



image-3870475949.jpg
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Unread 11-06-2012, 08:05 AM   #6
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Originally Posted by blubaru2002 View Post
I am aware that the hardtop is made of SMC and not fiberglass. I opted to use fiberglass anyway when I repaired my hardtop. It has held up fine. I suppose only time will tell.



Attachment 502767



Attachment 502766



Attachment 502765
Would you do the same to several cracks on top where it flexes?
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Unread 11-06-2012, 08:18 AM   #7
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Originally Posted by blubaru2002 View Post
Bondo Fiberglass resin jelly. Easy for hardtop DIY repairs.
When I bought my Jeep wrecked, the front portion was broken off and near the rear window was a crack in the hardtop. The body shop used fiberglass resin to fix it and it was holding up good since 2008 until last year the same crack showed up and a sunken seam formed where the front portion broke off.

After the winter, I'll be looking for the right resin or never put the top back on.
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Unread 11-06-2012, 08:46 AM   #8
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Originally Posted by asim04LJ View Post
When I bought my Jeep wrecked, the front portion was broken off and near the rear window was a crack in the hardtop. The body shop used fiberglass resin to fix it and it was holding up good since 2008 until last year the same crack showed up and a sunken seam formed where the front portion broke off.

After the winter, I'll be looking for the right resin or never put the top back on.
Evercoat and others produce a SMC specific resin. When I worked at a body shop it was my job to do all the fiberglass related repairs. Not that I was particularly good at it, but because I was a lot better at it than anyone else.
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Unread 11-06-2012, 08:52 AM   #9
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Originally Posted by mrblaine

Would you do the same to several cracks on top where it flexes?
Good point. Probably not. But I would say that besides where the hardtop flexes a lot on the roof, the fiberglass stuff I used works just fine. My repair is holding up well to the door shutting directly on it.
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Unread 11-06-2012, 09:02 AM   #10
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Originally Posted by mrblaine View Post
Evercoat and others produce a SMC specific resin. When I worked at a body shop it was my job to do all the fiberglass related repairs. Not that I was particularly good at it, but because I was a lot better at it than anyone else.
Thanks Mr. Blaine. I'll look into Evercoat.
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Unread 11-06-2012, 05:55 PM   #11
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Unread 11-07-2012, 07:50 AM   #12
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First, thank you all for the responses..
The story is that a few years ago a piece of marble stone fell off a building and cut straight through the hardtop of the jeep which was parked next to the building and landed on the driver seat
I got it fixed at a shop at the time, but few years later cracks began to form and now it leaks pretty bad..

Attached are pics from the inside and outside
2012-11-07-288.jpg   2012-11-07-292.jpg  
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Unread 11-07-2012, 08:03 AM   #13
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That example is exactly why polyester based products don't work well on SMC or polyester that is not SMC specific.

Those areas are large, flexible and fairly flat which lets them expand, contract and move around a whole bunch and if you want the repair to last, you must use SMC compatible repair materials.
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Unread 11-07-2012, 01:11 PM   #14
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Originally Posted by mrblaine View Post
That example is exactly why polyester based products don't work well on SMC or polyester that is not SMC specific.

Those areas are large, flexible and fairly flat which lets them expand, contract and move around a whole bunch and if you want the repair to last, you must use SMC compatible repair materials.
X2, I agree with Blaine. To do a permanent repair on the area you've pictured, you're much better off with an SMC-compatible resin.

This one is a likely case of "do it right or do it twice" .
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