Ideas to seal front jalousies while driving in rainstorm.

Not sure a shield will work completely. Many trailers have them built in from the factory (on hinges) and they help, but aren't impermeable.

You might be able to make a shield that would attach with studs and sealed with rubber weatherstrip?

Our 57 Corvette leaked one time in really nasty rain with an old Hehr window. Not too bad. Jalousies are so much worse...

Keep us in the loop, very interesting subject.

Was it the front window?

I had a problem with the front leaking in a rainstorm but the water was only coming in at the corner where there is no seal. I could see it in my rear view mirror, it looked like a small founatain. The panes didn't leak. If you look closely, you'll see that the bottom seal stops short of the end on all the windows. I think it is for ventilation purposes. I had some spongy foam weather stripping and I just stuck a small piece in that corner, closed the window tightly and no more leak.

My problem was the road water was actually coming UP my trailer front under the window by the force of the wind resistance. (only term I could come up with). I think there may be more purpose to a rock guard than rocks.

This indeed was my challenge as well, I think if the rain is hard enough there will always be a way for insidious water to get in past jalousie panes, at least some. This is only while driving. It seems the best option the friends gave me here were those rubber slots that fit in between the panes, as stated. Available at VTS. But really, a solid waterproof solution will probably be impossible. We replaced the front with a newer solid window for this reason but we were just worried and didn't want to deal with it. I hate water! Wait.. I'm thirsty. Anybody have a bottle of water?

I could ask you the same question mobiltec... 'what is sunshine?', 'cause you all seem to be hogging it.
We here in Ohio would gladly trade for a day, heck, I'll even throw in the snow showers that are expected next Tuesday. That's a trade-one-get-one-free.

Has anyone actually bought the $$$$ clear edge seals from Vintage Trailer Supply? I am wondering if they work. I would love to hear feedback.

Yes… I have.  I've not put them to the true road test yet, but my jalousies went from being able to slip a credit card between the panes when completely cranked shut, to virtually being sealed from end to end.  I expect this to be a big improvement.  Before the seals, I also had a very rainy trip earlier in the year where water was creeping up the front of the trailer and finding its way in.  I could clearly see it happening in the rear view mirror of my TV while driving.  It made a mess. It has been suggested that a pressure differential may encourage water to be drawn in, and it makes sense that that may be a contributor, but the aerodynamics of your tow vehicle also can contribute.  Air that travels under the vehicle emerges in the back and the air goes straight up and I think this is what causes the creeping upward of water toward the front jalousies.  I've also had problems in the rear window as well (not a jalousie but a double awning, where one of the awnings was not tight with the frame… I've since bent it back to square).  The back of the trailer interior would be full of copious amounts of road sand after a long day of traveling!  The same rear aerodynamic is true of the trailer as well; air coming out from under, travels straight up the back, before curling away and dissipating.  

I would give the seals a try; they're a good design, but consider the following. Order a length to fit on just one pane and cover up the rest of the window and shoot a steady upward,but gentle, spray with a garden hose to see how it performs.  If it passes the test, make sure to ask them to ship you pieces cut slightly larger than your need and have them pack them straight and flat.  There default shipping method is coiled or folded.  When they ship them that way, they will have kinks in them and they won't stay on the glass as well and will look messy when installed.  Make sure your glass panes are the right thickness for the seals to fit properly.  If your glass is too thick or too thin for the seals, they will not stay on the glass.  My glass was ever so slightly thicker than the spec, but they stay on firmly, so there is some minor latitude there.  You mount the seals on the TOP edge of each pane and they seal with the inside of the bottom edge of the pane above.  The top pane does not get one, but rather seals against the window frame's "top seal" which will have to be a different material and design and slides into a channel in the original design.  The bottom of the window frame also has a unique bottom seal.  If yours are like mine and are original, they are super dry and have no flexibility or sealing properties anymore.  So, I glued some household white rubber window seal strips right to the old bottom seal which sits snugly within a channel in the window frame.  Make sure the strips are not too thick or it will prevent the jalousie panes from sealing together and completely closing.  I had to find bottom seal stripping that would work with the thickness of the VTS seals… so now everything is nice and tight.  The upper window seal I did not bother modifying like that because that part of the window sits within a deep eyebrow and drip edge.  The bottom seal is really the most important, because the water that enters there, will sit on the sill of the window box and quickly run into your trailer, down the wall and onto the floor.