Water inside my rig, rain pouring

[RCouttolenc]

Need your help, rain is pouring while in Nova Scotia and water is getting inside my rig after I have fully changed all seas around vents, ducts and AC. It seems it gets to the upper parts of the slide outs and somehow gets inside the coach.
I have checked all toppers, and although they are fully wet, I have the feeling the are filtering water into the slide out. It is a 2018 Newmar model, it should not be having this issues. I am still researching where the water is coming from.
Anybody have any recommendation while I return to the US and find a good shop?
Is there anyway to use a spray to repel water at the toppers?

[jacwjames]

One place to check is to make sure the belt molding along the top is properly sealed.

I just went through all of mine after I found a bad place in the rear passenger side area. There was just a small area that did not have a good seal. All the water that its the roof has to run off the sides, the belt molding acts like a gutter so if there is a leak it finds its way in the coach.

[Ray,IN]

An emergency measure is to slightly tilt the MH up/down end to end if you have opposing slides leaking past the seals. If just one side of MH slides are leaking slightly lowering that side will re-direct water away from the slide seals.

[johnhicks]

A/C gaskets

[Craig1960]

We just left NS yesterday and went to NB to get away from the worst of the rain. As for your leaks I doubt anything you do to the slide toppers will help much, I've had m/h's that came with them and the po took them off and never replaced them and no leaks. It sounds like something wasn't installed properly.

[Hittntheroad]

I ran Zip tape along the joint that connects the slide topper to the gutter side to seal the sewn joint to keep water from getting on top of the slide.