Roof Rail Sealant

[YDrive]

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

[StewartW]

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.

[RedHorse1]

Applied carefully so not to look ugly Eternabond tape would be an excellent choice.

[Rustic Eagle]

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

[StewartW]

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.

[Rustic Eagle]

Originally Posted by StewartW

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

[LuckyDuck]

Originally Posted by Rustic Eagle

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). I’ve used Geocel Proflex and am happy.

[StewartW]

Lucky Duck
What sealant does yours have on the side roof seam? i am trying to figure out what they used since it can’t be Dicor as it doesn’t come in clear. Proflex specifically says don’t use on TPO roof.

[LuckyDuck]

Originally Posted by StewartW

Lucky Duck
What sealant does yours have on the side roof seam? i am trying to figure out what they used since it can’t be Dicor as it doesn’t come in clear. Proflex specifically says don’t 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, I’ll never know. Too lazy to go get the white caulking gun, I guess.

No, Proflex for the sidewalls, siding etc, not TPO.

[YDrive]

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.

[Yooper906]

Originally Posted by LuckyDuck

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, I’ll 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?

[Old and soft]

Originally Posted by Yooper906

Do you think that black caulk was factory?

It is on the rear end of the rain gutters on my 18 264bh.

[LuckyDuck]

Originally Posted by Yooper906

Do you think that black caulk was factory?

Oh yeah. It’s where the curved trim rails come up to the roof and attach. They certainly covered it well, I’ll give them that! No leaks and you really can’t see it from below.

[Yooper906]

Originally Posted by LuckyDuck

Oh yeah. It’s where the curved trim rails come up to the roof and attach. They certainly covered it well, I’ll give them that! No leaks and you really can’t 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.

[Jerry713]

Would this be a good application for Eternabond?

[LuckyDuck]

Originally Posted by Yooper906

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 I’m reasonably sure the dealer didn’t do it. Weird, though!

[StewartW]

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.

[Rustic Eagle]

Originally Posted by YDrive

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

[LuckyDuck]

Originally Posted by StewartW

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 doesn’t list rubber as a suitable surface. And it says it is not for EDPM. I guess if your roof is TPO, you’re good.

[StewartW]

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……..