[Steeldragon1]

I hate that when it rains and you open the doors the rain pours into the cab through the rain channels above the windows!

 

[Mudrunner]

There are already some vent visors out for the JL that fit into the channel, so you may want to look into those. They seem to be pre order only atm. https://www.justforjeeps.com/mopar-window-vent-visors-wrangler-jl.html

 

[JeepFan]

not bad price for vent visors at just $110 a set. however what I would like to see are some aftermarket versions with a bit more character.
rugged ridge was a great example of this with the JL for anyone that remembers.

 

[Comanche]

There are even cheaper sets up on Ebay. Not sure if you are from the UK, but they are up on there for 50 EUR and I've seen U.S products around $70. https://www.ebay.ie/itm/2018-In-Channel-Vent-Visors-Jeep-Wrangler-JL-4-Door-/253913494971

 

[JeepFan]

There are even cheaper sets up on Ebay. Not sure if you are from the UK, but they are up on there for 50 EUR and I've seen U.S products around $70. https://www.ebay.ie/itm/2018-In-Channel-Vent-Visors-Jeep-Wrangler-JL-4-Door-/253913494971

someone left a review that confirmed my thoughts prior to following the link you provided and that is to stay far away, spend the extra and buy from a reputable brand.

 

[TIDALWAVE]

Window vent visors only are effective in keeping rain out if the windows are nearly shut and the doors are shut also.

Check with Home about true rain gutter extensions. The molded extensions use 3M double stick tape to run from the front of the gutters forward down the A-pillars. They worked great on my JK. The extensions for the JL may not be ready for sale yet.

 

[JeepFan]

In my experience it has been with about 1- 1 1/2 inches that you can go before rain starts getting in. Used to do that when I was a smoker and didn't have a sunroof to let smoke out.