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Old 02-25-2015, 06:07 PM   #15
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........ also my worry is if I don't clean off the silicone on the roof seams good enough the new sealant will not stick and reseal the seam. It is not leaking now

When you start taking it off, clean it off well. If you are judicious with a straight edge razor, it will come off clean. You will need to get it all off for new calking to work.

You will go through several blades in a short time so I recommend that you just buy a box of a hundred...

My 72 had silicone EVERYWHERE and lots of it. Cleaning that stuff off sucked big time...





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Old 02-25-2015, 06:15 PM   #16
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Thanks for the info I did not think it was going to be simple. This forum is great

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Old 02-25-2015, 06:28 PM   #17
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Thanks for the info I did not think it was going to be simple.
Joe
It is good you are accepting reality. Anything that makes it easy to remove will probably remove things you don't want to remove. Acetone is my last resort solvent, but it removes clear coat too and I'm not sure silicone is vulnerable to it. I go the scrape route when I find silicone caulk in my house, although I might also try denatured alcohol just because it might help (unfortunately you can't drink it), but it makes me feel like it may be easier to scrape.

The irony of silicone is that something so hard to remove still leaks after several years. There are caulks with a mixture of silicone and other things—they are the paintable caulks. I don't know if they are as bad as silicone, but I'd stay away from them unless you find out that answer. I use Sikaflex.

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Old 02-25-2015, 06:34 PM   #18
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Silicone should NEVER BE USED ON AN RV!!!!!!!! ANYWHERE!!!!

PERIOD.


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or a lot of other places either!

Interestingly enough Keystone is using it in copious quantities on the Coleman line of travel trailers.

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Old 02-25-2015, 10:27 PM   #19
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or a lot of other places either!

Interestingly enough Keystone is using it in copious quantities on the Coleman line of travel trailers.

Aaron
WAIT.....'till the leaking starts!!!
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Old 02-26-2015, 01:11 AM   #20
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Just curious about Sikaflex -- How hard is it to remove?
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Old 02-26-2015, 07:15 AM   #21
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Just curious about Sikaflex -- How hard is it to remove?
VERY! Why would you want to remove it unless removing a component that was sealed with it around the perimeter.

But when you do get it off, you can easily re-apply more SikaFlex right over the area. With silicone, the residual stays on the substrate and makes re-application of ANY sealant (even more silicone) dubious at best.
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Old 02-26-2015, 09:30 AM   #22
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I had globs of silicone on many of the seams that PO applied. Good news was the Trade Wind did not leak. Bad news was polishing turned the silicone black....and very ugly. I tried many of the methods used here. Eventually I had the best results using gasket remover found at auto suppliers.

Neil
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