Casement window weather strip crumbling

Thank you for your patience during this incredibly busy season. I apologize for the long wait.

It's unfortunately not possible to identify what kind of seal you have based on these photos. This service requires a clear and unobstructed photo of the end profile.

Please note that this will require an undamaged sample. I know that yours is brittle and so this will be easier said than done, but there's no other way. If the sample is too damaged to make out, we can't help. Please try your best.