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Old 07-16-2020, 07:51 AM   #1
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Question Filon Tears, Rips and Cracks

Hello everyone,

I have 2 questions:

1) I have some tears in my rear wall filon: What are your recommendations for fixing it. (please see the pics).

2) What are your experiences with clear Flexseal Tape?

I ask about the tape because as of now my thoughts are to put Clear Flexseal Tape over the tears as I've heard that it works well and lasts a long time.

Thank you!
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Old 07-16-2020, 04:06 PM   #2
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I may be old school but with any Fiberglass based panel I prefer to sand it, clean it with acetone then add 2 layers of epoxy and fiberglass matting. If it is a stress area then more. If the visible side has cracks showing then I fill with a epoxy filler and, if needed, sand and paint.
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Old 07-17-2020, 08:11 AM   #3
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I would agree. Fiberglass the back side with matting to strengthen the cracks. Then, create a V groove for each crack on the outside and fill with 2 part epoxy thickened with filler.

I love West Systems products & support. They have a lot of reference material online that would help you to do it right the first time. And more help is just a phone call away.
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Old 07-17-2020, 09:00 AM   #4
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Thanks for the input.

I was really trying to find a quick and easy solution and not go through all that process, for the tears are simply from damage not from stress.



Any other ideas out there?
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Old 07-17-2020, 09:47 AM   #5
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Like above, sand, and put clear epoxy in there. sand again after dry, and polish. Flex seal is great but I don't think you should use the flex seal on this type of thing. Not experienced with their clear tape, but their paste is great and I use the black tape on the top side of my awning and it's still holing up great after a year.
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Old 07-17-2020, 10:22 AM   #6
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Quote:
Originally Posted by DRM901 View Post
I would agree. Fiberglass the back side with matting to strengthen the cracks. Then, create a V groove for each crack on the outside and fill with 2 part epoxy thickened with filler.

I love West Systems products & support. They have a lot of reference material online that would help you to do it right the first time. And more help is just a phone call away.

+1 on the West Systems. I would add the bonding agent to the back epoxy and the sanding filler to the fill on the crack.
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Old 07-17-2020, 10:34 AM   #7
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Thanks for the input.

I was really trying to find a quick and easy solution and not go through all that process, for the tears are simply from damage not from stress.



Any other ideas out there?

In that case skip the cosmetics on the shiny side and fiberglass the back. Once the cracking has started the load is no longer evenly spread over the sheet and there is stress concentrated at the ends. Glassing the back will unify the panel returning the strength.


It will be easy. You just need to clean the back, slather on some epoxy then a bit or matting and repeat the matting and epoxy again. Rubber gloves, old clothes you can even use a disposable paintbrush. Half an hour. Use real epoxy, not polyester. Ace hardware has it all.
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