How to Apply Window Glaze Putty

Sand the inside of the window pane frame with fine-grit sandpaper to remove residual glazing putty. You want a smooth surface when applying new window glaze putty. Blow off the sanding dust with a can of compressed air.

Apply a heavy coat of linseed oil to the inside window pane with a 1-inch paintbrush. Put a liberal amount of oil into the inner groove of the window pane frame where the glazing putty sits. The linseed oil helps prevent the wood from soaking in the oils from the glazing putty. This keeps the glazing putty softer and more pliable longer.

Open the can of glazing putty and remove a golf ball-size piece of putty with your fingers. Roll the putty between your hands and form a 1/16-inch rope. Press the glazing putty into the window pane frame groove. Repeat for all four sides of the window pane.

Start at one corner and slide a putty knife across the glazing putty to firmly press the putty into place. Cut off any excess putty with the putty knife. The window pane frame is now ready to accept the replacement glass and glazing points.