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Old 03-31-2021, 03:16 PM   #1
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Fantastic Fan and AC Leaks

My fan and AC were both sealed about 10 years ago. I am not sure what was used. Parbond is my best guess. It is gritty feeling and cracked now.

What should I use to reseal these? Should I use butyl tape on the fan?

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Old 03-31-2021, 03:42 PM   #2
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I just cleaned all the old 'caulking' off the vent cover and roof and re-sealed with 3M Extreme Sealing Tape, 3in/W
8+ years SFSG.👍

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Old 03-31-2021, 03:52 PM   #3
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Quote:
Originally Posted by ROBERT CROSS View Post
I just cleaned all the old 'caulking' off the vent cover and roof and re-sealed with 3M Extreme Sealing Tape, 3in/W
8+ years SFSG.👍

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Thanks Bob. I was hoping for an option like that. Do you have any experience with any of the foil backed tapes? I wonder if the foil would protect the tape almost indefinitely.



https://www.amazon.com/Repair-Covere...07F9JS61R&th=1
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Old 03-31-2021, 04:19 PM   #4
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Quote:
Originally Posted by Peter417 View Post
Thanks Bob. I was hoping for an option like that. Do you have any experience with any of the foil backed tapes? I wonder if the foil would protect the tape almost indefinitely.



https://www.amazon.com/Repair-Covere...07F9JS61R&th=1
I don't really. But why not give it a try and let everyone know how it works out...the more workable options we all have the better. Butyl without the backing is a known good between panel sealer.

To be perfectly honest the 3m option was only really supposed to be a short term stop gap repair, I had every intention of doing an R&R full monty job.
After a Spring get ready inspection the next season it still looked so good I just left it, it's been 7yrs.
I'll ck it again in a week or so but I don't expect any surprises.

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Old 04-01-2021, 09:24 AM   #5
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I've had Trempro 635 get that gritty feel on the surface after a few years. I like Sikaflex because it stays flexible and shiney.
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Old 04-01-2021, 09:28 AM   #6
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What Bob Said!

Just make sure what ever you use is compatible with aluminum. I believe itís sealers with a high carbon content will cause crevice corrosion.
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Old 04-07-2021, 12:15 PM   #7
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Things are dry after the first good rain

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