If you own a Ram Promaster or Winnebago Travato, you’ve probably heard the horror stories (or experienced them yourself) about water leaks. One of the most common complaints is water running down the top corners of the windshield or dripping from the headliner during rain.
Two frequent culprits cause this exact issue: the roof/clearance/dome lights and the small gap between the windshield glass and the van body.
Here’s exactly what happened on our van and how I fixed both potential sources.
Step 1: Reseal the Roof / Clearance / Dome Lights (The Most Common Source)
A lot of Promaster and Travato owners discover their water leak is coming from the amber and red clearance lights (also called marker lights or dome lights) on the roof. The factory gaskets can dry out, crack, or fail, letting water in that then runs down the headliner or trickles along the top of the windshield.
This was my first suspect, so I thoroughly resealed everything.
I used a good silicone waterproof sealant to:
- Reseal around each light base
- Fill every gap between the light housing and the roof
- Seal the mounting screw holes
Product I used: Silicone Waterproof Sealant
After letting it fully cure, I tested with a hose and waited for real rain. The leak continued. That told me the roof lights were no longer the problem (or at least not the only problem).
Even if the lights aren’t your current leak source, I still recommend resealing them. It’s one of the most common Promaster water leak points and a cheap preventive step.
Step 2: The Windshield Gap (The One That Actually Fixed Mine)
Once the lights were sealed and the leak was still happening, I looked at the top edge of the windshield — specifically the tiny gaps between the glass and the Promaster body at the upper corners.
I had some moldable silicone putty left over from resealing my flush tank inlet, so I decided to try filling those gaps.
I cleaned the area thoroughly, kneaded the putty until soft, and pressed it firmly into the gaps on both top corners of the windshield.
Product that finally stopped the leak: Moldable Silicone Putty
The amount in the pack was enough to cover the problem areas. After it cured, the next rain (and a hose test) showed zero water coming in. The mystery Promaster windshield leak was finally fixed.
Quick Summary – How to Fix Both Common Sources
- Roof / Clearance / Dome Lights Clean around the lights → apply silicone waterproof sealant around the bases, gaps, and screw holes → let it cure fully.
- Windshield Top Corner Gaps Clean the glass-to-body gap → fill with moldable silicone putty → press firmly and let it set.
Important Disclaimer
This is simply what worked on our Promaster/Travato. I’m not a professional technician — just a full-time van lifer sharing a real fix that stopped the water in our case. Every van can be a little different, so inspect carefully and use any products at your own risk.
If you’re searching for “Promaster water leak,” “Travato windshield leak,” “Promaster roof lights leaking,” or “how to stop water dripping down the windshield,” start with these two spots. They cover the majority of the reports I’ve seen from other owners.
Have you dealt with this same leak? What ended up being the source on your van? Drop a comment below — it helps other Promaster and Travato owners hunting for solutions.
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Stay dry out there!
— Trent & Nan | Trailnado