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-   -   Top crack repair (https://67-72chevytrucks.com/vboard/showthread.php?t=796783)

hubdawg 11-17-2019 07:11 PM

Top crack repair
 
2 Attachment(s)
Wondering if the best fix for these joints is seam sealer

hubdawg 11-18-2019 05:28 PM

Re: Top crack repair
 
Bueller.......Bueller........Anybody? trying to do this week and really trying to do it right...lol

truckster 11-18-2019 08:47 PM

Re: Top crack repair
 
I'm not a bodywork expert, but I think the answer would be that seam sealer would be a temporary fix at best. The top is made of SMC (sheet molded composite, similar to fiberglass) and what you're seeing is a structural defect. Seam sealer isn't meant for structural problems.

litebulblsc 11-18-2019 09:47 PM

Re: Top crack repair
 
Those are factory seams. What ever they used, is cracking out. The other common place i found for this to happen is in the gutters. I am of no help on the correct fix.

truckster 11-18-2019 09:57 PM

Re: Top crack repair
 
You might try the paint and bodywork subforum.

hubdawg 11-19-2019 12:51 PM

Re: Top crack repair
 
I'm thinking grind the old sealer out and recoat with new seam sealer and re-raptor the top. Definitely not structural just where the top was seamed at the factory, years of on and off probably pushed the 50 year old product to it's max.

A1971Blazer 11-19-2019 02:32 PM

Re: Top crack repair
 
grind and feather out the seam and repair with stranded fiberglass epoxy filler

hubdawg 11-19-2019 04:37 PM

Re: Top crack repair
 
Got a heads up from a local guy who recommended PC 11 marine epoxy which can be sanded and painted. I'll let you know how it turned out

truckster 11-19-2019 07:57 PM

Re: Top crack repair
 
Quote:

Originally Posted by hubdawg (Post 8629643)
Definitely not structural...

The seams on SMC are structural. It's where two pieces of molded composite were joined together. Look at the curve at the top of the window and you can see a crack around the radius.

litebulblsc 11-19-2019 08:13 PM

Re: Top crack repair
 
Quote:

Originally Posted by truckster (Post 8629838)
The seams on SMC are structural. It's where two pieces of molded composite were joined together. Look at the curve at the top of the window and you can see a crack around the radius.

Probably not corrcect to call it not structural. But the "crack" at the window is still just the seam opening.

truckster 11-19-2019 09:00 PM

Re: Top crack repair
 
1 Attachment(s)
I wasn't talking about the seam. It looks like there's a small crack that's around the radius of the window opening. The red lines point to what I'm talking about.

rayray767 11-27-2019 02:26 PM

Re: Top crack repair
 
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