Knead your putty until pliable. Roll into a rope slightly thicker than your finger. Press it firmly along the glass-to-frame junction, angling the putty to form a neat bevel (about 45 degrees). Smooth with a putty knife dipped in water or linseed oil (prevents sticking). Wipe away excess from the glass with a rag.
Carefully remove the broken glass from the window frame. Wear gloves to protect your hands from sharp edges. If the glass is shattered into small pieces, use a vacuum cleaner or a damp cloth to pick up the fragments. how to repair a broken window pane