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Old 07-16-2004, 08:25 AM   #15
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1979 30' Argosy
Havelock , where we park it
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I would say remove it now, why wait for it to leak and do damage.

Marvin & Annie
Niki (fur baby)
1979 Argosy 30 (Costalotta)
WBCCI 10103
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Old 07-16-2004, 08:30 AM   #16
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Silicone sealers break down their ability to bond, when exposed to the sun.

Therefore, any silicone sealer should "NEVER" be used on the exterior.

Airstream learned that lesson in the early 70's.

For those that don't know, when the silicone sealer lets go, the water leak appears again. Now the real fun begins. In order to use the correct material, either Vulkem, Parbond or Sikaflex, the surface "MUST" be chemically clean.

When you applied the silicone, you created a barrier, that must be removed chemically, completely. If not, none of the other sealers will bond.

Lastly, installing silicone sealer on the roof makes it difficult to inspect. Therefore you will find when it has let loose, after a good rain. Problem" Too late!!

Lastly, and for those that like good looks, attached is a photo of what silicone will look like in a couple of months.

Not very eye appealing. Not good for the trailer. Not good for the owners pocket book, to fix the problem.

Not much left to debate.

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Old 07-17-2004, 07:19 AM   #17
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Originally Posted by brohloff
Suspect this is going to be a really dumb question but here it is nevertheless - Helped a friend the other week replace his antenna on his '76 25' Tradewind Landyacht.
We used 100% Silicone to seal the outside roof bracket to the roof. About a dozen screws actually hold it in place.
Should we have used Vulcem? And why not Silicone? What kind of mess have gotten ourselves into? A wet one?
bob r...
There is alot of good information in this thread about the pros of using Vulkem. Another Vulkem "plus" is that it is specifically designed for use in vehicles that have joints subject to vibration and expansion/contraction. Other sealant's would not hold up under these stresses.

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