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Old 04-06-2015, 07:09 PM   #1
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Roof sealant touch up

While on the roof of my X23B over the weekend, I found a couple of spots where the roof sealant developed small holes around the bathroom skylight. I went on Amazon to buy a tube of Dicor and found that they make one for EDPM, and one for TPO. I know my roof is AlphaPly so I went to their website and they recommend something completely different for their roof system. Can someone clear up my confusion? I'm just touching up the sealant, not fixing a hole in the AlphaPly. What should I use? Thanks!
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Old 04-06-2015, 08:07 PM   #2
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Read carefully. Some manufacturers specify a special caulk if it contacts the skylight material.
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Old 04-06-2015, 08:33 PM   #3
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My roof is Alpha-ply and I did a complete touch up with Dicor around all roof vents, etc. I carefully cleaned the old caulk surface with mineral spirits [don't get any on the roof] and applied the Dicor caulk to caulk.
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Old 04-07-2015, 02:38 PM   #4
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Do you happen to know which Dicor you used? There seems to be more than one kind.
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Old 04-07-2015, 08:22 PM   #5
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Quote:
Originally Posted by 12VOLTMAN View Post
Do you happen to know which Dicor you used? There seems to be more than one kind.
Self leveling, in white. I tried not to allow the Dicor to come into contact with the roof because I read somewhere on the Forum that Alpha-ply roofs don't like the petroleum distillates contained in the Dicor, although they dissipate rapidly during the curing process. There were a few places I caulked along the front seal that came into contact with the roof and no ill effects noted. It's been over a year now. This is an example of what some of it looked like before I did the touch up.


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Old 04-08-2015, 07:13 AM   #6
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Thanks! I was looking on amazon at Dicor that comes in tubes and there is one made for EDPM, and a seperate one for TPO. I was just wondering if the one you used specified a difference? I might try emailing Jayco just to be safe.
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Old 04-08-2015, 09:05 AM   #7
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Thanks! I was looking on amazon at Dicor that comes in tubes and there is one made for EDPM, and a seperate one for TPO. I was just wondering if the one you used specified a difference? I might try emailing Jayco just to be safe.
12voltman, I would be interested in knowing what you find out from Jayco as to their recommendation.
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Old 04-08-2015, 09:55 AM   #8
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From what I have read Dicor 501 is supposed to be compatible with EPDM and TPO roofs. I tried double checking on their website but it is down right now.
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Old 04-08-2015, 08:04 PM   #9
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I just looked at a couple tubes of Dicor that I recently purchased. Both self-leveling (501) and the non-sag (551) say it can be used on "some TPO roofs". What that means, I have no idea. Wish I could be more help.
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Old 04-08-2015, 08:11 PM   #10
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Alpha ply does make a non sag and a self leveling seam sealer I think the numbers are 10/10 and 10/15
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