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Old 08-18-2010, 02:07 PM   #1
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What do most of you use to seal tail lights, clearance lights, ladder mounts and horizontal seams (molding?) I have looked on other sites and they say NOT to use silicone. Many said to use dicor but it is so messy to use and clean up. I asked the local RV shop and they use silicone from the roof down and dicor from the roof up. They said to get rubber gloves and 100% silicone that is waterproof from Home Depot. Then smear the silicone with your finger using the gloves. My husband calls it sillycone since he says it doesn't seal air, water, oil or gas leaks. Got any ideas, since what we are doing doesn't look very professional
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Old 08-18-2010, 10:58 PM   #2
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Hi, Geocel makes Proflex and Dicor has a non sag seam sealer. The trick is in how you prep the surface and cut the tip on the tube. Use painters tape to mask left and right of the caulking seam for a nice professional look. Next cut the caulking tube at the tip just enough to open the tube and at a 45 degree angle.



You don't want to use silicone asmost are not UV stable.
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Old 08-18-2010, 11:55 PM   #3
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When I was at the factory they now use Sikaflex 715 RV it is UV resistant and a pretty good product. Here is the link.

http://www.sikaconstruction.com/sika-recreational-vehicle-roof-sealant
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Old 08-19-2010, 01:53 AM   #4
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That looks good on the roof but we're more interested on the side seams of the trailer that show. Also around the fender skirts etc. that show when you walk by. Anything will look good up on the roof were you can't see it. We need a good sealant that looks good cosmetically also
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Old 08-19-2010, 02:10 AM   #5
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I like 3M 5200 white Marine Adhesive/Sealant. I use it on my boat and on my trailer. It's a polyurethane material so may even work well on the roof.

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Old 08-19-2010, 02:32 AM   #6
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Quote:
Originally Posted by KennyB
I like 3M 5200 white Marine Adhesive/Sealant. I use it on my boat and on my trailer. It's a polyurethane material so may even work well on the roof.
Do NOT use 5200 to seal anything you may have to take apart in the future, such as lenses on lights, fender seams, etc.

To remove it will cause you to ruin whatever it's on. It is a permanent adhesive. Great for attaching items which won't be removed but absolutely no good for anything which may have to be un-stuck at a later time.


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Old 08-19-2010, 02:35 AM   #7
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I have used the Proflex for a couple of years and have been very happy with it. Use it around trim, windows, etc., but not on the roof. Use Dicor lap sealant on the roof.
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Old 08-19-2010, 02:46 AM   #8
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Quote:
Originally Posted by gbsell@sbcglobal.net
That looks good on the roof but we're more interested on the side seams of the trailer that show. Also around the fender skirts etc. that show when you walk by. Anything will look good up on the roof were you can't see it. We need a good sealant that looks good cosmetically also
This is what Randy at service used on our FW all over(windows, lights and trim . It is what they recommend, take it for what it is worth.
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Old 08-19-2010, 02:51 AM   #9
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I guess I am not understanding your point. Dicor non sag sealant dries and looks similar to your OEM material, so does Proflex. The roof self leveling Dicor is NOT what I suggested using. If your purely looking for cosmetics then just go to Walmart and buy some Great Value silicone sealant - it will sure look purdy but do nothing to stop potential leaks... JMHO.



The Silkaflex is the OEM but is not sold in my area. Randy said Geocel (proflex) is the next nearest sealant to the OEM.
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Old 08-19-2010, 04:55 AM   #10
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The Proflex is a good sealant that will do what you want in terms of water proofing. Cosmetically, it all depends on how good you are when applying it. Don't cut the tip to large and be conservative. If you have to much sealant coming out of the tip in relation to how fast you are moving it, itwill build up on the edges on look bad. If all else fails use you finger to smooth it out, just have a LARGE towel handy to clean your finger after every wipe. Like anything else, it takes practice to make it look good.
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Old 08-19-2010, 11:37 AM   #11
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I bought a tube of Proflex RV Flexable Sealant in clear to go around the windows and seams. What I meant in my first post is Dicor self leveling is messy to work with and you can't go back and try to smooth it out since it wants to make webs that string down onto the decals, paint etc. We will mask off the top and bottom of the seam before we use this like you suggested. That was a good idea, much better than the idea of going to Walmart. I don't want the trailer to look like Stevie Wonder did it! I do have pride in the trailer.

Edited by: gbsell@sbcglobal.net
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Old 08-19-2010, 02:11 PM   #12
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As was stated earlier, the Dicor self-leveling lap sealant is intended for use on the roof only.
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Old 08-19-2010, 03:14 PM   #13
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I wouldn't go to a dealer that uses silicon for anything. After it fails, and it always does, nothing else will stick where it was. It doesn't belong on a RV.

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Old 08-20-2010, 03:08 AM   #14
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We're not that's why we're doing it ourselves.
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Old 08-21-2010, 05:21 AM   #15
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I sort of misspoke a little earlier about the 3M 5200 sealant. I do use it on my boat for sealing screws when I install them but what I use for sealing around things is 3M Marine Grade Silicone Sealant, 08019. It works great and stays flexible. I've never had an issue where I've applied it, then had to remove it and apply it again and not have it stick. It seems to hold up well to sun and harsh environments.

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