Sliding Window Weatherstipping

[Sea Dawg II]

My boat is a 1989. All the rubber around the windows has hardened and is cracking. No leaks, but it does make for some ugly water stains when it rains. I would like to replace with fresh material, and maybe not be scared to open the windows (right now I'm afraid they will start to leak, or worse).
Anybody done this before? Where did you get the material, and how hard was it to accomplish? Worse case, I can just use sealant and keep them permanently shut.

 

[The Bill Collector]

Rubber with a felt coating is what I had in my '89 and I never did go down the rabbit hole to source it...

 

[Pirate Lady]

My boat is a 1989. All the rubber around the windows has hardened and is cracking. No leaks, but it does make for some ugly water stains when it rains. I would like to replace with fresh material, and maybe not be scared to open the windows (right now I'm afraid they will start to leak, or worse).
Anybody done this before? Where did you get the material, and how hard was it to accomplish? Worse case, I can just use sealant and keep them permanently shut.

I have same windows. Taylor Made, might be able to source from them.
That said, we have windows screens. We never ever close the windows, ever. Rain, winter, snow, never. Only once did we ever get a little water pooling on the fiberglass galley top, and that was a heavy sideways rain storm.
Interior is fresh, no mold. Air circulation is the trick. The screens do a great shop of keeping water out. Would be a big mistake to seal shut.
Its ‘usually’ not the windows that leak, its the frames. Fiberglass hull flexes, the frames dont, causes gaps. Hence the reason SR went from the long windows to the tiny port holes.