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Old 08-11-2019, 02:20 PM   #1
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Eternabond not so long lasting???

Years ago we used eternabond to seal up assorted roof vents and other items on a fiberglass roof.

Prepped properly.

Where it is on flat spots, roof and fixtures it is bonded well but the corners have failed.

Seems it is weak on a stress point.

The white covering does not like the sun and it could be part of the issue.

The plastic dome looks to have separated a bit from the roof allowing it to move compounding the failure there but other fixtures are well attached.

Yet some are like new, shade maybe protecting it some.

Have not contacted manufacturer yet, looking to see if anyone else has had similar issues.

Going to scrape it all off and use dicor or other material.Click image for larger version

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Old 08-11-2019, 02:27 PM   #2
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Mine has been in place many years and looks nothing like yours. Was something painted over it?
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Old 08-11-2019, 05:26 PM   #3
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No paint, just central ca sun.
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Old 08-11-2019, 07:04 PM   #4
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Could you indicate a better time period? 'Years ago' can cover quite the range and a little more narrowed down time period might be pertinent.
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Old 08-11-2019, 08:23 PM   #5
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I have used Eterabond on a lot of projects, some have over five years exposure. I had one minor problem once when I inadvertently stretched the tape slightly while applying and it pulled back at one corner. Never have seen any failures like your pictures. Sorry your having issues.
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Old 08-12-2019, 02:44 PM   #6
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Eternabond

Quote:
Originally Posted by TQ60 View Post
Years ago we used eternabond to seal up assorted roof vents and other items on a fiberglass roof.

Prepped properly.

Where it is on flat spots, roof and fixtures it is bonded well but the corners have failed.

Seems it is weak on a stress point.

The white covering does not like the sun and it could be part of the issue.

The plastic dome looks to have separated a bit from the roof allowing it to move compounding the failure there but other fixtures are well attached.

Yet some are like new, shade maybe protecting it some.

Have not contacted manufacturer yet, looking to see if anyone else has had similar issues.

Going to scrape it all off and use dicor or other material.Attachment 256529Attachment 256530
I had the same problem on my last m.h. ,and I posted a note about it, but nobody cares. They claim 15 years life, but mine lasted about 7 years.sun beats it badly.
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Old 08-12-2019, 03:16 PM   #7
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I'd say 7 years is excellent service if in a harsh environment. 15 years for more typical usage. As a Sun Belt resident myself, I subscribe to the notion that intense sun can severely shorten the working life of most anything.


That said, I used Eternabond tape to make "temporary repairs" to a damaged metal roof after a tree limb plunged through it. That was about 17 years ago at our Florida home and it's still holding strong. It's in the shade, though.
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Old 08-12-2019, 08:17 PM   #8
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Originally Posted by Gary RVRoamer View Post
As a Sun Belt resident myself, I subscribe to the notion that intense sun can severely shorten the working life of most anything.
I agree, although sand doesn't seem to be fazed by the sun beating down on it day after day, after day.
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Old 08-13-2019, 01:31 AM   #9
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Isn't the proper procedure to seal the edges of Eternabond tape with Dicor? Just something that I was told and wondering if it's the proper procedure?
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Old 08-13-2019, 09:13 AM   #10
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I have issues with etranabond tape on my RV but it goes back to not properly prep of the underlying surface.

Whoever applied the tape did not clean the surface first....
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Old 08-13-2019, 12:27 PM   #11
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Quote:
Originally Posted by KiteSquid View Post
I have issues with etranabond tape on my RV but it goes back to not properly prep of the underlying surface.

Whoever applied the tape did not clean the surface first....
Sealed all seams on my 1999 Dutchstar. first cleaned all seams and removed loss caulking.
Used several layers on cap seam working from back to front.
Rolled all tape as specified in instruction. 4.5 years in Fl sun.
After eternabond used 2 part roof coating up to 1/2 inch on tape.
Tape and roof still look great. Clean it every 4 months just to keep mold under control.
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Old 08-13-2019, 12:43 PM   #12
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Quote:
Originally Posted by DryCreek View Post
I agree, although sand doesn't seem to be fazed by the sun beating down on it day after day, after day.
Sand was a shell once...
Beside, have you really ever watched ONE grain of sand for a years to see how it fared in the sun??
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Old 08-13-2019, 06:16 PM   #13
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Sand was a shell once...
Beside, have you really ever watched ONE grain of sand for a years to see how it fared in the sun??
Well, sometimes there's just not much else to do around here. I asked the sand where it came from, and it said it was eroded from a nearby rock ledge by the wind, and the infrequent rain. It never burnt or discolored in the blazing sunlight we get here in summer, so I figure it is some pretty sturdy stuff.
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Old 08-14-2019, 11:59 AM   #14
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Quote:
Isn't the proper procedure to seal the edges of Eternabond tape with Dicor? Just something that I was told and wondering if it's the proper procedure?

Never heard of that until it was mentioned here. Nothing in the Eternabond instructions or recommendations about routinely sealing edges with Dicor or other caulks.



https://dwincorp.com/wp-content/uplo...structions.pdf


Eternabond suggests using caulk if there is a gap problem with layers of the tape or a pucker (fish mouth) on the dge.

https://www.eternabond.com/v/vspfile...ps_install.pdf
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