window gasket

Hello, I have 3 windows and 1 patio door that I believe date from pre-2011 (see photo 1). All of the gaskets are black and quite worn and I'd like to replace them with new white gaskets. The internal gaskets on the windows are all wedge gaskets that can be removed fairly easily. I thought the...

My double glazing windows have huge gaps in the corners where the gaskets have shrunk and need to be replaced. The gap between the window and the frame is broad, so I'm having trouble finding a replacement gasket. The only one that's somewhat near the size I need is this one -...