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Old 08-05-2013, 08:32 PM   #1
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Roof sealant question - Dicor VS SB 140

I am trying to seal the Shower area ROOF skylight and am not sure if the previous owner of my touched it up with Dicor or Surebond SB 140.
The rig is: 2005 National Seabreeze with a fiberglass roof.

QUESTION:
1) Can I put Dicor self levelling sealant over SB 140?
2) How about the other way around. Can SB 140 go over Dicor?
3) Which is better ?

Thanks in advance.
John
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Old 08-06-2013, 12:11 PM   #2
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John: It is the half a dozen question.... I used Dicor....it is on the shelf locally you can use the other too. They bond over each other's cured product.
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Old 08-06-2013, 10:57 PM   #3
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Thanks for the reply Craig.

The reason that I ask is that the manufacture specifically says to only use Surebond SB 140. Like you, I would think that they are basically the same but wondered if they could go over each other because I don't really know what the previous owner used (but he used a lot )
What would happen "If" I choose wrong and put one over the other? Would it peal off? or would it leak?

Thanks again.
John
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Old 08-07-2013, 06:48 AM   #4
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If you choose incorrectly...you might promote improper adhesion of the sealant and early failure ....which leads to leakage
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Old 08-07-2013, 10:58 AM   #5
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I recently replaced the skylight over my shower and also went ahead and scraped/resealed the entire roof of my coach...

I replicated what was on my roof and used BOTH SB140 and Dicor lap sealant. The SB140 obviously had a large bead sealing the mating surfaces together. There was SB140 where the plexiglass material touched the fiberglass of my roof. THEN the edges were sealed with Dicor. That is how it was, so that is what I did. No issues thus far.

There is a great YouTube video on this as well, and their situation matched mine.

www.youtube.com/watch?v=aYXFwCOT0Iw

BTW, resealing my roof took 11 tubes of Dicor, glad I bought the case at a discount on Amazon.

Chris.
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