Bulb Seals will make all the difference
Sometimes called “D” seals also... You may know them by that name.
I just tried to post a link to Amazon for the type that Keystone builds plastic channels for, but not sure it will post here because it is a web address..
Go to Amazon and search for "AP Products Black 018-350-EKD Premium EK Seal for Slide-Out Rooms"
and you will see what I mean.. they come in different sizes so be careful you order the right one for your plastic channel width..
|