The main reason for this project was the annoying rattling noise the windows made when the companionway door closed.

While this didn't completely cut out the drafts (there are plenty of other places for that to happen), it did stop the rattling.

I got some household door weatherstripping from the hardware store. The one here is the kind made from foam wrapped with a nylon cover and a rigid plastic strip attached, running its length. I cut the pieces to the right length for the bottom and two sides of each window. Then I put a small bead of 5200 on them and pushed them down into the window slot, insuring the 5200 side was toward the wood.

Well, I made quite a mess, and probably wouldn't do it that way again (the 5200, that is). Since then I have seen some automotive replacement door seal trim that probably would have worked a lot better. It has a gripper channel that probably would have just clamped onto the edge of the wood panel with the insulating bubble towards the window. Oh, well....