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Old 04-21-2015, 03:49 PM   #1
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Dicor Self Leveling over Newmar Applied Sealant at Roof Joint

I have six sections of roof joint (three on each side) where the roof curves over from the top to the side. It appears that Newmar had installed some type of rubber sealing in these joints. While I was checking and sealing the roof this spring with the coach still in storage (indoor facility), I decided to coat these joints with the self leveling Dicor sealant. Here is the forward passenger side joint that I am referring to:

I am now second guessing that decision. The reason for my concern is the original sealant applied by Newmar seems to be a material with flexibility similar to RTV, although I am sure it is some other material. The Dicor remains flexible, but not as flexible as the original sealant so I am wondering if it will pull the original Newmar sealant out of the joint and the joint works and heats/cools with time.

Am I over thinking this or should I remove the Dicor I applied while it is still relatively fresh?
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Old 04-21-2015, 05:00 PM   #2
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I have used the white Dicor on the roof of my old Winnie...
I used a oscillating cutter blade to remove the old black caulking...
Put a bead down & used a putty tool to smooth out a bit...
It will get harder over time & looks rather nice...
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Old 04-21-2015, 05:05 PM   #3
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The self leveling Dicor is only for use on horizontal surfaces, it's too thin to stay in place on a vertical surface. They do make one for vertical surfaces but I think I'd call Newmar and find out what they used originally and go with that.
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Old 04-21-2015, 06:04 PM   #4
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I almost did the same thing yesterday. I used the self-leveling dicor to seal my roof seems and noticed the roof joints needed some attention as well. I started to do what you did on one joint, but stopped and opted for a clear, flexible silicon for exterior use (because that's what I had on hand). I'll keep an eye on it and if it doesn't hold I'll probably go to an RTV.

By the way, this was my first time using the self-leveling appears 'self leveling' is a subjective term. It did it's job but it still pretty much looks like the bead that was originally put down. I know it's the roof, but I would've preferred it look a little better than it does.

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dicor, leveling, newmar, roof, seal

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