Leak from coach roof light area

[Frosty.sm]

Noticed some signs of moisture trickling down from the aft coach roof lights after a few back to back rainy days. It's subtle but definitely enough to be a concern, I haven't pulled the trim yet, but I'm betting the sealant's finally given up, dunno if there's a go to fix owners have settled on, rebedding with butyl, switching to silicone, or something else entirely? Would love to hear how others have done this previously

 

[PacketSkipper]

Sometimes the leak might appear far away from its actual source. If you're in a pinch, you could make small holes in the liner to follow the water's trail. And definitely avoid sealing leaks from the inside,that just locks in moisture and creates problems elsewhere. It's always best to tackle the issue directly at the source, from the outside.

 

[Delvan0]

I'd pull the trim, inspect for cracks, and clean everything well andI'd go with butyl tape, it's flexible, long-lasting, and easier to redo later if needed

 

[PotRoastRx]

Noticed some signs of moisture trickling down from the aft coach roof lights after a few back to back rainy days. It's subtle but definitely enough to be a concern, I haven't pulled the trim yet, but I'm betting the sealant's finally given up, dunno if there's a go to fix owners have settled on, rebedding with butyl, switching to silicone, or something else entirely? Would love to hear how others have done this previously

Leaky deck lights are a pain! Forget silicone for anything on deck, bcs it fails.
Your best bet is rebedding with butyl tape. It's flexible, seals great, and is easy to work with (and remove later). Clean everything perfectly before you rebed. That should do the trick!

 

[IslandHal]

Noticed some signs of moisture trickling down from the aft coach roof lights after a few back to back rainy days. It's subtle but definitely enough to be a concern, I haven't pulled the trim yet, but I'm betting the sealant's finally given up, dunno if there's a go to fix owners have settled on, rebedding with butyl, switching to silicone, or something else entirely? Would love to hear how others have done this previously

I have to agree with the others here as butyl tape is generally the preferred method for rebedding deck hardware and lights.
When you go with this, make sure to thoroughly clean all mating surfaces, removing every trace of old sealant.
Chamfering the holes slightly before applying the butyl tape can also help create a better seal by allowing the tape to compress into the chamfer and around the fastener threads.
Apply the tape in a ring or bead that fully covers the area where the light will sit, ensuring it surrounds the fastener holes.
Tighten the fasteners slowly and evenly, allowing the butyl to squeeze out over a period of time, then trim the excess.
This gradual compression ensures a good, tight gasket-like seal!