Our living room window needed some work (the bottom sill was a bit rotted -
I repaired it). I removed all three dual pane sections from it. I bought
some black window putty (in roll form) to re-set the window.
My question: There was some type of grey plastic liner that surrounded the
outer edge of the window dual-panes (it is like a thick poly plastic used
for vapor barrier). It looked like this plastic was glued on with a type of
contact cement. Should I put new plastic liner on? Is it necessary? Can I
just apply the black roll of putty directly to the window and the frame?