Agree with advice already given. I just recently noticed some staining on the inside of my shower skylight. I removed the interior piece and it was obvious I had a leak in one corner.
Careful probing and inspection of the self-leveling sealant around the skylight on the roof revealed nothing. I could absolutely not find any cracks, lifting or any evidence of the sealant failing. Nevertheless, as I started to remove the old sealant I found water under one corner. I removed all the sealant, cleaned the roof well with acetone and installed a new exterior skylight panel with Dicor. Since my skylight was 10 yrs old and started to look a little aged, I decided to replace the outer skin.
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.