Window exterior seal/glaze/beading coming off

[vaarta]

Hello fellow campers/RV-ers. First time poster here!

I own a 2017 Apex Nano (185BH).

Please see attached pictures. I am not sure exactly what to call it -beading/weather seal/exterior glaze? - but the rubber seal thingy running around one of the windows is coming lose.
An RV repair shop I called told me to use a hair dryer to stretch it out. I did that...and made it worse in the process.
Because we are expecting some rain later today, I just used a bunch of sealant to seal it off, but was hoping to get a new beading.
Could anyone tell me what size the seal is? And where I can buy it?
Thank you for your help!