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Old 06-14-2022, 04:33 PM   #1
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Roof Rail Sealant

While I am waiting on my new plug from the other debacle, I noticed that the caulking where my roof rolls over the edge isn't so great anymore.

Fortunately it sits under cover at home so I can take my time and remove the old then apply the new. The question is what is best? The old stuff is clear so I am guessing it's Proflex? I have read mixed things about that in direct contact with an Alpha Ply roof.

Would nonself leveling lap sealant be safer since it touches the roof? Thoughts?

Thanks
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Old 08-02-2022, 07:13 AM   #2
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Did you ever figure out what the sealant was used on the roof edges in you pic? Mine needs some touching up as well where the sealant has separated from the roof material.
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Old 08-02-2022, 08:47 AM   #3
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Applied carefully so not to look ugly Eternabond tape would be an excellent choice.
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Old 08-02-2022, 10:32 AM   #4
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I've had great results with my TT's using Dicor Non-Leveling Lap Sealant. I also use some blue painter's tape creating a straight sealant edge along the roofing material.

I resealed my 2018 TT gutter rail/roof joint 2 years ago:



Bob
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Old 08-02-2022, 10:59 AM   #5
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Looks great. Thats what I have done before on other RVs but my Jayco 2020 NP 310 does not look like it has Dicor lap sealant on the side walls. I dont believe they make it in clear. Just trying to figure out what the clear sealant Jayco used so I can touch up a few spots and not have to remove all it to apply something else.
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Old 08-02-2022, 01:08 PM   #6
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snip....... Just trying to figure out what the clear sealant Jayco used so I can touch up a few spots.......snip
I don't recall the brand/type of sealant you are referencing, I'm sure someone will chime in with the correct info......., I do recall it was mentioned before.

I did find one JOF thread where it was mentioned that from the factory Jayco uses ISO Quad sealant on 'vertical' surfaces. Reference Post #8 in following link:

https://www.jaycoowners.com/forums/f...ely-62608.html

Here's another JOF thread on the subject of clear sealants used:

https://www.jaycoowners.com/forums/f...ulk-68991.html

Bob
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Old 08-02-2022, 02:41 PM   #7
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Quote:
Originally Posted by Rustic Eagle View Post
I don't recall the brand/type of sealant you are referencing, I'm sure someone will chime in with the correct info......., I do recall it was mentioned before.

I did find one JOF thread where it was mentioned that from the factory Jayco uses ISO Quad sealant on 'vertical' surfaces. Reference Post #8 in following link:

https://www.jaycoowners.com/forums/f...ely-62608.html

Here's another JOF thread on the subject of clear sealants used:

https://www.jaycoowners.com/forums/f...ulk-68991.html

Bob
When I emailed Jayco about ours I was told they use Geocel on the exterior (not roof). Iíve used Geocel Proflex and am happy.
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Old 08-02-2022, 03:02 PM   #8
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What sealant does yours have on the side roof seam? i am trying to figure out what they used since it canít be Dicor as it doesnít come in clear. Proflex specifically says donít use on TPO roof.
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Old 08-02-2022, 03:42 PM   #9
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Lucky Duck
What sealant does yours have on the side roof seam? i am trying to figure out what they used since it canít be Dicor as it doesnít come in clear. Proflex specifically says donít use on TPO roof.
The trailer is not at home at the moment, but here is an old photo of the roof. It looks like white Dicor. Definitely not clear. Why they globbed black caulk on the front rails, Iíll never know. Too lazy to go get the white caulking gun, I guess.

No, Proflex for the sidewalls, siding etc, not TPO.
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Old 08-02-2022, 03:46 PM   #10
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Whatever is/was on mine was definitely clear and behaves like aged ProFlex but from what I read it can't be since it touches the roof membrane.

I removed mine where it would come loose, it's a bear. Then taped it off and used white nonsag alpha sealant. Not sure how it's going to hold up.but we left for a month trip and I wanted to do something.

I only did the worst areas, I will be taking another look once getting home.
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Old 08-02-2022, 04:53 PM   #11
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The trailer is not at home at the moment, but here is an old photo of the roof. It looks like white Dicor. Definitely not clear. Why they globbed black caulk on the front rails, Iíll never know. Too lazy to go get the white caulking gun, I guess.

No, Proflex for the sidewalls, siding etc, not TPO.
Do you think that black caulk was factory?
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Old 08-02-2022, 05:14 PM   #12
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Do you think that black caulk was factory?
It is on the rear end of the rain gutters on my 18 264bh.
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Old 08-02-2022, 05:23 PM   #13
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Do you think that black caulk was factory?
Oh yeah. Itís where the curved trim rails come up to the roof and attach. They certainly covered it well, Iíll give them that! No leaks and you really canít see it from below.
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Old 08-02-2022, 05:33 PM   #14
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Oh yeah. Itís where the curved trim rails come up to the roof and attach. They certainly covered it well, Iíll give them that! No leaks and you really canít see it from below.
o.k. Just looked to me that it was put on after factory sealing, it's covering the screw strips and vinyl screw covers and the white sealant from the factory. I don't know why they would glob on black sealant over the white.
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Old 08-02-2022, 05:55 PM   #15
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Would this be a good application for Eternabond?
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Old 08-02-2022, 05:55 PM   #16
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o.k. Just looked to me that it was put on after factory sealing, it's covering the screw strips and vinyl screw covers and the white sealant from the factory. I don't know why they would glob on black sealant over the white.
I assumed it was. We bought it new and Iím reasonably sure the dealer didnít do it. Weird, though!
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Old 08-03-2022, 09:06 AM   #17
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Heard back from Jayco customer service and they stated in an email that the clear caulk along the roof side seams and corners is Geocel 2300MHRV.
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Old 08-03-2022, 12:21 PM   #18
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snip....... used white nonsag alpha sealant. Not sure how it's going to hold up ........ snip....... I will be taking another look once getting home.
Appreciate the follow-up......., and if it's compatible with the roofing material I'm sure it will be just fine..., but let us know how it holds over time.

Bob
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Old 08-03-2022, 02:00 PM   #19
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Heard back from Jayco customer service and they stated in an email that the clear caulk along the roof side seams and corners is Geocel 2300MHRV.
Interesting! While the Geocel site says it is formulated for travel trailer and RV uses it doesnít list rubber as a suitable surface. And it says it is not for EDPM. I guess if your roof is TPO, youíre good.
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Old 08-03-2022, 02:05 PM   #20
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Yep it’s a little confusing but I have it in an email from Jayco., just in case. My roof is the Diflex II which is a TPO. At this point I am gonna go with it……..
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