Cracking up - what to do?

[LuckyDuck]

I was doing my end-of-season roof inspection today and noticed the Dicor around the bath skylight flange has some tiny hairline cracking. The Dicor is thick and it appears to be just very outermost skin. I’m sure it’s nowhere deep enough to leak in any way, but…

Should I: 1) Clean and add another layer of self-leveling Dicor? 2) Clean and cover with e-bond? 3) Ignore for now? The trailer is five seasons old. If e-bond tape is the answer, should I try to gently scrape the Dicor down with a plastic blade to get a flatter surface? Or just push the tape right down over the humps snd ridges?

Thanks!

[Grumpy]

Get a roll of ETERNABOND, clean the Dicor and cover with the tape... Then you can do it again in about 10-15 years.

[Midnightmoon]

If there are no soft spots in the Dicor, you could simply clean and cover over with fresh sealant. If you find any bubbles or soft spots in the old sealant, scrape that off and reseal accordingly.

[Jerry713]

This is why I'm not a big fan of Dicor. Not saying it's a bad product but the water content in the product results in cracking granted it generally takes a long time for this to happen. I prefer a product similar to 3M 4000UV. AFCAT 945 is another sealant with low water content.

I would remove the cracking sealant, clean thoroughly and re-apply a new sealant of your choice.

[Jagiven]

Originally Posted by Grumpy

Get a roll of ETERNABOND, clean the Dicor and cover with the tape... Then you can do it again in about 10-15 years.

X2, this is what I did about 5-6 years ago, looks like I applied it yesterday.

[RogerR]

I used an old hair dryer and plastic scraper and removed Dicor on the plastic around the skylight and found a bubble that had let in water. I replaced it with 4 inch wide Etearnabond. If I ever have to replace the skylight I will just cut it at the skylight edge, pull the screws and install new over the old Etearnabond it I don't want to take it up.

[LuckyDuck]

Thanks, all, for the help. It sounds like e-bond is definitely the way to go, either sooner or later. I fear the yellowed skylight is going to be due for replacement fairly soon and that may be the time to do a nice e-bond tape job.