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Old 03-11-2019, 10:16 AM   #1
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Eternabond width question

I have a 2018 Flagstaff 29KSWS and want to eternabond the front and back roof seams. Camper is currently covered and probably won't be able to uncover till end of the month and want to cover those seams as soon as I uncover. So wondering from you that have done this, what is the best width of eternabond to order to cover these seams properly? Appreciate any incite I can get.
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Old 03-11-2019, 10:42 AM   #2
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6 " is all I would do my ends with
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Old 03-11-2019, 10:54 AM   #3
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Not sure what the price difference is between 4” and 6” Eternabond but if you’re going to do this......more is better so hopefully you only have to do it once.
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Old 03-11-2019, 10:56 AM   #4
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Either 4" or 6".
Preferably 6".

6" is a little harder to work with but worth it IMHO.
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Old 03-11-2019, 11:31 AM   #5
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Thanks for the replies all so far. I was thinking 6" but have watched several videos of others using 6 or 8". I figured the 8" would be way too hard to work with and seems those that used 4" had to overlap 2 layers of it so I kind of already put the 4" as last choice. But looking to you experienced folks to save myself some grief if I order the wrong width beforehand. Thanks again- really like this forum.
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Old 03-11-2019, 11:46 AM   #6
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just to satisfy my curiosity I just went and took photos of my nearly 3 year old e-bond install of my front seam. I used 3 inch, but only covered about an inch of the factory installed lap sealant and not the entire lap sealant as shown on the left front side of the first pic. My trailer will be 5 years old in September and that front seal is still solid at the lap sealant.

The sealant is still tightly stuck to the fiberglass front as is the e-bond. At some point, when I detect some loosening of the sealant, I will probably put a 2 inch wide strip to cover the exposed sealant, but only after shaving the lumps off with a razor blade.

pictures below
front seam right to left, gutter seam left, gutter seam detail
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Old 03-11-2019, 12:11 PM   #7
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rsdata, that looks like it is holding up great! Very encouraging to me to see your results. I hope on keeping my camper for quite awhile, so wanting not to have to worry about those seems for several years. Thanks for sharing the pics.
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Old 03-11-2019, 12:20 PM   #8
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I use Two 6 inch wide x 10 foot rolls and keep the excess for emergence roof repair patches.
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Old 03-12-2019, 12:06 PM   #9
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Ok.. so as a result of this thread I finally decided to join the Eternabond cult.

Do I need to remove the old self-leveling Dicor at the top seam where the front meets the roof or is ok to just cover it with the 6"wide stuff?

I already bought (but have not installed yet) corner seal tape. I was thinking of doing both the top seam and the corners this weekend. Thoughts?

I have a fiberglass Rockwood. Roof is in overall good shape and was replaced 3-4 years ago.
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Old 03-12-2019, 02:45 PM   #10
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I have read threads where some have taken a hair dryer and a plastic putty knife and scraped old caulk off... I would do this if the sealant was failing.

I did my roof at two years, well before any sealant had come loose.

I merely cleaned the caulk, razor bladed off the high spots, then applied over the old sealant.

My full story here

Roof preventive maintenance
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