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Old 08-05-2003, 07:29 AM   #1
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Question Caulking above blue molding ?

We are getting ready to put the blue molding in we got from Andy. Just came back from our first Rally , it was mentioned to us to caulk above the insert lines for both. After checking the trailer , see that there is some caulking there but very dried out . Is this where we use the Vulkem? Thank you .. This forum has helped us out greatly with our Airstream.
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Old 08-08-2003, 04:00 PM   #2
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Hi - I haven't seen any caulk used where our molding is. Of course, ours is very deteriorated with just pieces of original vinyl insert still in place and the whole thing painted over by PO. We understood from another post here that the vinyl insert slides into the track (the edge of the track help hold it) and you must rivet thru the end caps of the track and insert both to hold it in place. Andy was the one who posted this info. You might just check with him for further details. Hope this helps. Leigh
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Old 08-08-2003, 04:46 PM   #3
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The sealant used above the beltline then was ten-x. You can purchase the current sealant from Parkview in Smyrna De. it is called Acryl-R it is made by Schnee-Moorhead (SP?). People use other things but this is gray-silver with metalic flake and blends in really well.
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Old 08-08-2003, 05:16 PM   #4
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Quote:
Originally posted by JPAIRSTREAM
The sealant used above the beltline then was ten-x. You can purchase the current sealant form Parkview in Smyrna De. it is called Acryl-R it is maid by Schnee-Moorhead (SP?). People use other things but this is gray-silver with metalic flake and blends in really well.
Thank you JP for the input!
I really feel bad about people being forcefully directed to use Vulkem 616 or else...
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Old 08-09-2003, 09:15 AM   #5
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Correct sealers

Different areas of the trailer or motorhome, require different sealers.

Vulkem is used where strength is required. Use it for large seams, such as above the windows, around the ceiling vents, above the door, wheel well area, and where the chassis enters the shell. It is also used between the seams when replacing sheet metal as well as around the shank and behind the head of Olympic rivets before inserting them in the hole. It is also used on the bottom side of the Airconditioner pans, and sewer vent pipe covers, TV antennas, radio antennas, and with any installation of other items on the roof.

Parbond is used on the sides of windows, around the top and sides of clearance lights (never the bottom), sheet metal seams and at the top edge of moldings (for cosmetic purposes). It can also be used between the metal frame and glass, on the 68 and older trailers.

Sikoflex, generally speaking is used on the back side of the exterior metal, during production or major body work.

Silicone sealers must "NEVER" be used on the exterior. It can be used in the interior in the bathroom, or galley area.

TenX, was a sealer used some 30 to 35 years ago. It was OK then, but if it was exposed to a hot sun, it would dry out, shrink, curl up, and turn black. It usually fell off in a couple of years or so.
It, like many other things, is a part on RV history of many years ago.

Andy
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Old 08-09-2003, 10:38 AM   #6
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????

So now I'm confused?? Do or do not use a sealant/caulk when installing the vinyl molding> and if yes, what exactly? I thought the lip of the metal railing, plus the rivets thru the end caps on the railing was enough. Enlightenment is needed, please. Leigh
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Old 08-09-2003, 11:22 AM   #7
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Method for vinyl insert

No sealer is necessary when replacing the vinyl insert, except at the ends where the pop rivets are used.

Andy
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Old 08-09-2003, 01:11 PM   #8
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SILICONE SEALER

ANDY

WHAT DOES SILICONE DO TO THE EXTERIOR OF THE SKIN FOR IT NEVER TO BE USED?

THANKS

BILLY
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Old 08-09-2003, 03:23 PM   #9
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NEVER USE SILICONE ON THE EXTERIOR.

Why?

It looks great when you put it on and it stops the leak, maybe!!!

The dirt in the air that we breathe sticks to it making it turn black or brown, or just plain yuck!!!!

The sun attacks it and it then comes loose.

The water leak reappears.

NOW, no sealer will stick to the silicone traces.

You must scrape the metal to remove the traces of silicone.

Now, you can use vulkem or parbond as should have been done in the first place.

Ask anyone, repeat anyone, thats been there and done that.

Andy
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Old 08-09-2003, 03:57 PM   #10
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Acryl-R is being used on the seams on the outside of the Trailers during construction at the plant.

Par-bond however is being sold in the field for this because acryl-r is hard to get over the counter.
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Old 08-09-2003, 04:21 PM   #11
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A Couple Additional Questions...

if someone used silicone to seal around the windows, what is the best way to remove all traces of it?

Where can we find Par-bond for sale? Would any local places carry it? (like auto or home improvement stores or RV dealers)

Thanks for the help!
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Old 08-17-2003, 03:10 PM   #12
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Silicone on aluminum is a no no

I have worked on helicopters for 33 years and we stopped using silicone on aluminum along time ago. It is corrosive on aluminum. I use Vulcem and Parbond just as Andy said. This was after removing all the silicone the original owner had used EVERYWHERE. I used spray electrical contact cleaner and a brass tooth brush to clean off everything. I had made an aluminum scraper to slowly cut the silicone off. The small brass tooth brush won't scratch the aluminum. I got my Parbond from a local RV center. They had clear and silver. $3.95 a tube.

Dave Spann, Lake Charles, La.
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Old 08-17-2003, 08:34 PM   #13
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"Parbond is used on the sides of windows, around the top and sides of clearance lights (never the bottom)"

This may confuse someone, so I thought I would elaborate. Parbond is very fluid. You can force it up into the bottom of a seam, but it will run back out. Even if it does not run out entirely, it will leave gaps where water can enter.

Now, with respect to clearance lights, you may want to leave the bottom free of any kind of sealant to allow any moisture that gets in a place to come out. Perhaps Andy or someone could correct me here if I am mistaken.

Mark
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Old 08-18-2003, 08:19 AM   #14
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Mark.

Your correct.

Andy
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