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Old 07-22-2021, 07:45 AM   #1
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Dicor self leveling lap sealing issue?

I replaced our black tank vent cap and used the Dicor self leveling lap sealant. It appears the Dicor pulled my rubber roof from plywood underneath and created bubbles in it. It has only been 10 hours since I applied the Dicor and it sat overnight in a heavy dew. Is this normal? Should I be worried? Suggestions?
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Old 07-22-2021, 08:28 AM   #2
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no not normal

did you use any solvent on the roof when replacing that vent?

petroleum-based solvent will ripple that roofing material like that...

give it some time and may shrink down

If not get some Eternabond tape and tape over that area
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Old 07-22-2021, 09:42 AM   #3
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no not normal

did you use any solvent on the roof when replacing that vent?

petroleum-based solvent will ripple that roofing material like that...

give it some time and may shrink down

If not get some Eternabond tape and tape over that area
Yes, I used denatured alcohol to clean the roof prior to installing the vent. Also, I used an adhesive on the two piece vent cap to make it one piece.
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Old 07-22-2021, 09:56 AM   #4
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Is your roof membrane a Dicor product or is it made by Alpha?

There have been prior posts from folks using Dicor sealant on Alpha roof membranes with similar issues. (rippling)
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Old 07-22-2021, 10:02 AM   #5
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Is your roof membrane a Dicor product or is it made by Alpha?

There have been prior posts from folks using Dicor sealant on Alpha roof membranes with similar issues. (rippling)
I don't know the manufacturing of the roof membrane. If it helps I have a 2015 Coachmen Leprechaun.
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Old 07-22-2021, 12:25 PM   #6
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I don't know the manufacturing of the roof membrane.
There should be info in the original packet you got when you bought the camper...

Otherwise google " do I have an alpha roof" and that may get you somewhere...
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Old 07-22-2021, 12:32 PM   #7
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Quote:
Originally Posted by rsdata View Post
no not normal

did you use any solvent on the roof when replacing that vent?

petroleum-based solvent will ripple that roofing material like that...

give it some time and may shrink down

If not get some Eternabond tape and tape over that area
If rubber pulled back that easily,. I wonder how well it was glued down to begin with. Before Eternabond, tape if necessary,. I would scrape the Dicor off and start over. I clean the mineral oil off with rag then a light amount of rubbing alcohol.
Oh gosh I spoke too soon. Be sure that is in fact a rubber roof or the like and not the vinyl stat that Thor puts on some of its roofs. That vinyl stuff is a different beast altogether and very little will stick to it
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Old 07-22-2021, 12:58 PM   #8
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I can't really tell what I'm looking at. And it doesn't help that you took the pictures in portrait mode. Always take pictures in Landscape mode with the button on the right.

Pictures 1, 3, and 4 show that the Dicor has flowed. That's what it does. You bought their "self-leveling product." It reflows. It has not necessarily affected the roof membrane. If you want the caulk to stay put, you should have bought their "no-sag" product.

Are you concluding that just because the Dicor reflowed, that the membrane has somehow wrinkled? It doesn't look like it has.

And what is the cardboard and tape for?

The roof seems to be textured. EPDM, one of the common materials, is not textured. Really like to know what it is.
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Old 07-22-2021, 01:21 PM   #9
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Personal opinion but I'd let it ride for a while and if it doesn't get any worse, leave it along. It's not a problem if it doesn't.
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Old 07-22-2021, 01:21 PM   #10
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I can't really tell what I'm looking at. And it doesn't help that you took the pictures in portrait mode. Always take pictures in Landscape mode with the button on the right.

Pictures 1, 3, and 4 show that the Dicor has flowed. That's what it does. You bought their "self-leveling product." It reflows. It has not necessarily affected the roof membrane. If you want the caulk to stay put, you should have bought their "no-sag" product.

Are you concluding that just because the Dicor reflowed, that the membrane has somehow wrinkled? It doesn't look like it has.

And what is the cardboard and tape for?

The roof seems to be textured. EPDM, one of the common materials, is not textured. Really like to know what it is.
I must have missed that?
What are you referring to?
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Old 07-22-2021, 01:22 PM   #11
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DICOR 501SLW is compatible with both EPDM and TPO roofs. That roof resembles neither.
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Old 07-22-2021, 02:33 PM   #12
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Quote:
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I don't know the manufacturing of the roof membrane. If it helps I have a 2015 Coachmen Leprechaun.
My 2012 Leprechaun had TPO roofing (thin material with slight texture same color both sides. I used Dicor *Self-Leveling Lap Sealant on (3) NEW roof vents and NO issues.

EDPM is normally white then bottom is black and thicker rubber material)

Found this simple ID chart online.
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Old 07-22-2021, 03:29 PM   #13
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I have an Alpha Roof and it has a texture like the OP picture. It's definitely different than the EPDM roof on my previous unit. In researching the roof, Alpha explicitly states that using any sealant other than Alpha sealants will cause the membrane to lift from the decking. You can buy the Alpha sealant on Amazon or directly from LCI. You just have to figure out which Alpha Sealant you need.
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Old 07-22-2021, 05:03 PM   #14
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It looks like Alpha roofing to me.

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Old 07-22-2021, 05:57 PM   #15
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Quote:
I can't really tell what I'm looking at.
Pics 1 and 4 show a bubble formed on the edge of the Dicor, at least that is what I saw...
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Old 07-22-2021, 08:16 PM   #16
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So i have 2018 5th wheel and i removed my tv antenna on Tuesday to replace it when scraping with my thumb the sealant off the roof i think its epdm looks just like posters roof it pulled right up i used no chemicals on the sealant.i thought sealer would take little more work to remove.it also seems the glue didn't bond the osb to epdm roof.i guess need send email to forest river find out what type i have.
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Old 07-22-2021, 10:14 PM   #17
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According to the 2015 Coachmen Leprechaun brochure, it has a TPO roof.
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Old 07-25-2021, 02:59 PM   #18
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Sorry for hijacking your post.today installed my new tv antenna and it appears i have tpo or alpha roof same color on bottom side.i had said in my other post it pulled lose where the factory had seal around the edge of tv antenna mounting plate that area pulled up but where sealant wasn't it appears to be glue down so i dont know if factory used the wrong product or whats going on.had anyone ran into this?
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Old 08-05-2021, 10:29 PM   #19
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It's normal. Happened to my TPO roof when sealing solar panel brackets. Took two monts5for it to lay back down.
This what I got from Dicor when I contracted them.

What you are seeing is gases from the sealant coming out and pulling up on the membrane. This is a common occurrence and will lay back down on its own. Do not try to flatten or do anything to the wrinkles, it will flatten back out on its own.

It is still waterproof after 3 hours.

Thank you.
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Old 08-06-2021, 01:52 PM   #20
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I flew over your camper in my plane and it looked good from 450 ft.
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