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Old 06-20-2012, 12:11 AM   #1
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Sealing belt-line trim?

Since I've essentially hot-dipped my entire Airstream in sealant, I am wondering what to do with the belt-line trim. I can't really tell if it is possible for water to get into the trailer by getting under the trim, as that is one of the few parts of the trailer I haven't removed.

Should I run a bead of sealant all the way around the top of the belt-line trim or am I wasting my time? I am also worried water will get in there and freeze and push the trim out. There are small gaps in many places already.
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Old 06-20-2012, 06:19 AM   #2
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Originally Posted by Friday View Post
Since I've essentially hot-dipped my entire Airstream in sealant, I am wondering what to do with the belt-line trim. I can't really tell if it is possible for water to get into the trailer by getting under the trim, as that is one of the few parts of the trailer I haven't removed.

Should I run a bead of sealant all the way around the top of the belt-line trim or am I wasting my time? I am also worried water will get in there and freeze and push the trim out. There are small gaps in many places already.
The belt line trim (moldings) don't leak.

Andy
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Old 06-20-2012, 06:22 AM   #3
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I sealed mine with a small thin bead along the top edge. FWIW I also put a bead behind it before reinstalling it. Belt and suspenders, feel sorry for the next poor soul that has to take it off.

Aaron
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Old 06-20-2012, 07:31 AM   #4
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The aluminum piece that holds the trim is attached by rivets which has the potential to leak. I laid a bead of parbond on the top edge of mine. Whether it was needed, I don't know, but I sleep better knowing it is sealed.
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Old 06-20-2012, 07:51 AM   #5
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Seal the top edge and leave the bottom open. There are areas where the wraps are on top of the body skin and that acts like a funnel if you get a leak in the belly band. I have been sealing the rivets with Parbond that attach the rivets. I sealed the top edge with Trempro-635.

That same type of trim on SOB trailers that goes over the top corners is usually the death of them. They ALL LEAK. Now in this application, I would at leak seal the top edge.

Perry
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Old 06-20-2012, 09:22 AM   #6
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The belt molding didn't leak on my testing.

The #1 largest water intake I found on my trailer was the step release slot. In any rain, it directed (lots of) water into the belly pan. The original design provided a water intake, pink insulation, and a belly pan to keep the water inside. I had the floor wood removed over that area for a few weeks while I identified leaks and repaired damage, so I had good opportunity to observe what was happening. I installed screened drains in the belly pan, replaced the stinky pinky, installed aluminum bubble insulation elevated by aluminum screen, and coated the frame with POR-15.

I wouldn't call the step release slot a leak. It's a designed water intake.
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Old 06-20-2012, 10:18 AM   #7
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I guess I should have been more exact, as now I am a bit confused with some answers... I mean to put a bead of seal between the skin and the belt line... Looking at it, I can see that the plastic trim sticks to the metal. I am not worried about the plastic part (yet)... Just the very first thing the water hits on its way down the skin.

From underneath, there is at least a 1/4 inch drop lip, which I don't want to seal unless there is some reason to. The gap is really big and it would take lots of goo.

Thanks.
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