Glass and Glazing

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Across
  1. 1. glass that may crack under pressure but tends to remain integral
  2. 5. paste-like material used to fill gaps and bond surfaces
  3. 8. a light or sheet of glass
Down
  1. 2. two or more panes of glass separate by a spacer
  2. 3. a window located directly above a door opening
  3. 4. the vertical parts of the frame on both sides of the window
  4. 6. glass that breaks easily producing long, sharp splinters
  5. 7. glass that shatters completely under higher levels