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Old 06-15-2020, 02:37 PM   #1
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Roof Joint Sealer?

Own a 2016 Winnebago Winnie Drop with the one piece fiberglass roof. Plan to inspect and redo as needed the caulking / sealer along the lips where the roof meets the trim that transitions to the vertical sides.

Thinking any good paint store clear exterior grade silicon caulking would suit my purpose, but is there something specifically designed to do this?

Appreciate any help.

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Old 06-15-2020, 02:44 PM   #2
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My go to sealant for the roof and other seams anywhere on the coach that need something -

It ain't cheep but with a 15 year warranty as compared to no warranty of the usual suspects it's worth the price. Best to avoid silicone. It does seal nicely but if you ever have to remove it getting anything to stick while silicone once was, including more silicone, is difficult.
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Old 06-15-2020, 06:20 PM   #3
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Roof Joint Sealer?

I used Eternabond tape around all seams...

I covered all of the existing lap sealant with it. My camper is 4 years old and is stored under cover when not in use. It was VERY concerning the amount of air bubbles in the “old” sealant that popped and exposed the ceiling beneath...Eternabond tape makes me feel much more confident that it’s sealed
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Old 06-15-2020, 06:55 PM   #4
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If you are going to do something you might as well overdo it.

3M makes an adhesive/ sealant that once cured between two surfaces is darned near permanent. It is 4200 sealant, commonly used to bond things together on boats.
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Old 06-16-2020, 06:27 AM   #5
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I would be using the enterna bond and self leveling chalk on top. not sure if being fiberglass roof makes a difference but I have always heard not to put silicone on the roof. I use Proflex rv for vertical joints.
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Old 06-16-2020, 06:43 AM   #6
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A lot of RVers use Dicor self leveling sealant. It is made for RV roofs. It is for horizontal surfaces. They have a non leveling sealant for vertical jobs.
Bill Tobler
Lake Jackson, TX
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Old 06-16-2020, 07:02 AM   #7
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Appreciate the responses. Will look at all to see which is best for my needs.

Always great to learn from the personal experience of others.

Thanks again.
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roof, seal

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