Hey guys
I need the seal in the picture that goes in the window channel? I have noticed a little bit of water each time I wash and these are dry rotted pretty bad and theres chunks missing out of them!

I noticed LMC has a seal but not sure if it's what I need
http://www.lmctruck.com/icatalog/bzc/full.aspx?Page=13
Number 18 and the part number is 36-6196.
If that isn't it what is an alternative to it?