I have 30 year old house/windows. The windows are aluminum clad wood made my Crestline/Vetter who I think are no longer in business. I'm attaching a photo of the original stripping. The flat part is 1 3/16" wide and the bubble is supposed to be round (I think).
Casey from SWISCO responded:
January 20, 2023
Hello,
We'd be happy to look into this for you but could you confirm how your seal installs? I don't see any kind of kerf or backing that would hold it in place. Thank you.