Which rain seal would work?

A home owner from California says:
I have constant rain intrusion with these casement windows, which the previous homeowner identified as Pell, but Pella hasn't been able to help me resolve this - yet, and I'm trying to track down a rain seal that would work to install on the sash.

Thanks!
Spencer
casment part
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I'm not sure what it is you have. Could you remove a small sample and show us a clear picture of its end?
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