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Old 12-16-2013, 08:18 AM   #1
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2008 25' Safari FB SE
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Black goop

I am doing some rewiring and need to seal the large hole in the floor where a wire bundle comes in. What is the black goop that Airstream uses to seal around wires? My AS is 5 years old and the factory sealant is still pliable so it appears to be really good stuff.


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Old 12-16-2013, 08:34 AM   #2
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It may be Vulcan Sealant


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Old 12-16-2013, 08:37 AM   #3
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I was told it is Sikaflex, a one part polyurethane adhesive, sealant. You cab find it at boating places like West Marine.
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Old 12-16-2013, 10:14 AM   #4
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Originally Posted by lsbrodsky View Post
I was told it is Sikaflex, a one part polyurethane adhesive, sealant. You cab find it at boating places like West Marine.
There are six different compounds each bearing the Sikaflex name. Three of them are primers, and one is a two-component system. One is only available in white (but cures to a light gray color, subject to yellowing as it ages).

The one you want is probably Sikaflex 15LM. It's also available in colors, so you can get Sikaflex 15LM in Aluminum Gray as well as in Black and other colors (but avoid lighter colors; they tend to yellow as they age). No primer required for non-porous surfaces. Here's a link to the product data:
WBCCI #1105

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