Leak above shower

Ok well heres how the day went. I went to local rv shop to buy some dicor. The owner was working the counter so I told him what was up. He cursed the day skylights wer born. He also advised drill 1/16 holes to stop the crack and eternabond all around it. So that's what I did. I also bought a tube of dicor as well. I found another crack in another skylight so I drilled and dicored it and caulked some other spots. 30$ spent but I think I can sleep easy knowing it should be good until the fall check up.

Ugh I can't decide what to do. I got on the roof today and found a half inch hair line crack in the plastic skylight near the caulking. A couple other questionable spots in the caulking look iffy. Makes me wonder if I missed in the fall or they detiorated. Anyways I know I can get a new skylight, cover everything with eternabond or just go buy a tube of dicor. I'm thinking the easy way cause I'm gonna take some time off of work to do it since will be warm and no rain.
The good news also is I took inside cover off and water seemed to go straight down crack and put screw holes. Very little moisture in ceiling. I put a fan in bathroom and will let run for few days.
Thanks for the input all.

Can't even remember how many times I have re-caulked the shower skylight in my 2001 Mobile Scout. Wish I had skipped that option. Remember, a skylight by definition is a hole in the roof. Good luck. Bill

If your roof material is fiberglass or aluminum, you can easily seal around the skylight so it never leaks again - unless the sun eventually cracks the skylight material itself such that it's not a joint sealing issue (however, 1' or 2" EternaBond can of course also be used to permanently seal cracks in the skylight material) . You don't need to mess with a chaulking gun at all.

Just lay down a 4" wide strip of EternaBond tape around the entire skylight's edge ... about 1 1/2'' onto the skylight edge material and about 2 1/2" onto the roof material. You don't even have to remove any existing chaulking. 4" wide EternaBond will cover it all and still keep all water out for a long, long time. I used white colored EternaBond because our fiberglass roof is white.

Depends on what you want to do. After inspecting mine, I ordered new ones. Many different opinions on what to do. Chalk or get new. I pulled the whole thing because I wanted to make sure there was no water damage.

Basic overview of what I did.

Pull trim ring, try to get a feel for where water is coming in at. Get on top and look at skylight. You might be able to see one or more of the following. Cracked chalk or cracked skylight or maybe both. My skylights said to use SB140 chalk. Which I didn't like to use. Dicor much easier to work with imo. I called skylight manufacture and they said dicor is OK but many people don't put on enough and don't put on right dicor. I also have a strange size of skylight. My dealer to order said 2 to 3 weeks. I just went with next larger size that was commonly available. Total process took better part of the day.

After you pull trim ring, strap up or somehow get a fan in there to dry things out. Even if you don't have much insulation. With lots of insulation (I have about 4 inches worth) pull out any that is flat from being wet and stick in new. If you have foam insulation, no need to pull out, just dry.

I used Dicor to re-seal my skylight. Don't skimp - I put it on too thin & it cracked. Another thicker layer on top fixed it.

Good advice from those above me. Eternabond and Dicor have worked wonders for me. Might as well spend some time and redo the whole thing and not have to worry about for a while because you know something else will pop up!

I might cut the loose or dried caulk away and re-caulk with Dicor. Clean the edges of the roof where the new caulk will go as clean as you can to ensure a good seal. I have not used any eternabond on the present coach but we had a leak on the Itasca and I caulked all the side seams (Winnebago supplied caulk) and the E-bonded them. Best stuff I ever used. Worked on seal around the A/C on a roof vent also. (not leaking but I sealed it to make sure it did not ever)

That's what I figured. Next question .... skylights call for different sealant?