rubber stripping around casement windows

We may have a good match for you, but before I recommend anything I will need you to remove a small sample of the original and show me a clear picture of the end profile. The video below will go into more detail as to what I mean.

Thank you! We don't sell a seal in this exact shape, unfortunately, but our 58-053 is very similar. This has the same style kerf that pushes into the slot in the window, which is one of the most important features. The only major difference is that yours has a "V" shaped head while ours is a bubble. As long as the dimensions match up, however, then it should be fine. It will have the same coverage and will seal the elements out just as well.

Profile drawing of the 58-053 bubble seal.