hi tim,as mentioned earlier just clip the bead back into place-thats old kommerling pvc so should just clip in working from the corner then into the middle(bend the bead so it engaged into each corner then push into place-no mallett needed)the black rubber gasket will push into place-again starting at each corner,don't worry if it seems a bit longer than needed and don't snip it to suit just squeeze the excess in if you have to(they reduce in lenght over time-hence it could be longer)from the photo it looks like you'l have to retreive the outer gasket/rubber and put back in place first thoughps the white plastic part of the rubber faces away from the glass