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Old 07-17-2018, 12:15 AM   #1
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Lexel on roof?

While getting my 2018 coleman light ready for its first trip i noticed water leaking from the antenna knob on ceiling. I took the cover off and drained water out of it. Apparently not much water as i couldnt feel or see any wet wood or insulation. Looked on top and saw where the sealant had peeled back and cracked a little. A storm was coming so all i had was Lexel to try to repair it. Seemed to work fine for now. Has anyone else ever tried this? Not sure if its a temporary fix or if itll work for the season.
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Old 07-17-2018, 09:57 AM   #2
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I had to research Lexel because I hadn't heard or seen it before. After reading the Tech Data and Application brochure, I'm still puzzled. Nowhere does it state it's resistance to UV, important if your patch is exposed to sunlight. It does say "'Ideal for use indoors or outdoors" but then almost every example is for indoor use.

I guess you can be the guinea pig, let us know if it works. Just be aware, a leak can not only damage the structure of your roof but mildew and mold can develop and be dangerous. I'd carefully monitor the repair. You weren't real clear on where you used it, if you re-bed the antenna base on the roof, there are specific RV approved products for that. Bedding a fixture on the roof mostly shields the 'caulk' from sunlight, so you might be O.K.
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Old 07-17-2018, 11:46 AM   #3
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This is what a leaky roof will doClick image for larger version

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Old 07-17-2018, 03:58 PM   #4
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It wasnt my first choice just my only choice at the moment. It was all i had as another storm was moving in. Whatever material was used from the factory had separated in 2 small places. Its was a putty looking material smeared around the seams. Im trying to learn these materials and what to purchase for future. Just wasnt sure if anyone else had ever used this. Ill probably have to redo it soon as im not sure about UV resistance but i know it great for water. I use it alot around the house. Ill keep a close eye on it.
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Old 07-17-2018, 04:16 PM   #5
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Your description of, " a putty looking material smeared around the seams." sounds like Dicor self-leveling caulk, an RV roof sealant of long standing.
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Old 07-17-2018, 04:25 PM   #6
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Quote:
Originally Posted by BFlinn181 View Post
Your description of, " a putty looking material smeared around the seams." sounds like Dicor self-leveling caulk, an RV roof sealant of long standing.
But needs to be checked maybe twice a year as it does crack
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Old 07-17-2018, 04:32 PM   #7
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As far as I know, Lexel is just another clear silicone sealant. It's only distinction is that it's marketed in a clear tube. I wouldn't use it on your TT. Use Dicor (self leveling or non-self leveling, or Eternabond tape (black or white).
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Old 07-17-2018, 04:35 PM   #8
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Thanks. Ill get some and redo it correctly. I just used what i could to keep water out for the moment. Its been storming every day here for last few weeks.
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Old 07-17-2018, 05:09 PM   #9
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The airsteamers use it a lot. Can be applied even in the rain and makes a lasting seal.
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Old 07-17-2018, 05:21 PM   #10
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Lexel is not silicone.

The technical data says it is not compatible with rubber.

The solvents in Lexel are naphtha and toluene ( http://www.sashco.com/hi/pdfs/LXLClear_SDS.pdf )

Neither one is recommended for use on EPDM.


https://www.matsmatsmats.com/commerc...chemicals.html
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Old 07-17-2018, 07:27 PM   #11
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Thanks for that info. Ill remove it and fix it right as soon as the rain lets up.
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Old 07-17-2018, 07:36 PM   #12
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The airsteamers use it a lot. Can be applied even in the rain and makes a lasting seal.
What's an 'airsteamer'?
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Old 07-17-2018, 07:41 PM   #13
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A little lexel would probably fuse (chemical weld) two pieces of epdm.

Before removing the lexel, have some Dicor sealant and perhaps some eternabond tape on hand.

You may be fine, or the lexel may have softened the roof.

Toluene is used as an epdm cleaner when splicing, so a little lexel may not have done much damage.

http://www.bestmaterials.com/detail.aspx?ID=19720
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Old 07-17-2018, 07:45 PM   #14
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Non of it actually touched the epdm roof. I put it between the vent and dicor that separated and antenna and dicor. So up against the plastic and original caulking. Would take pics but rain isnt letting up. I did go in to check and see no sign of leakage for now.
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