Surfaces should be clean, dry, and free of frost. Wood sash that is not primed or painted must be primed first with an oil-based primer and allowed to dry. When re-glazing, remove all old putty and bedding. If any separation has occurred in glazing, mix entire contents of container until uniform. Do not thin glazing compound. If necessary, place glazing in hands and roll into coils to warm and soften. Smooth glazing to an angle that sheets water with a putty knife. Typical dry time before painting is one to two weeks, depending on temperature and humidity. Putty must be painted after it has skinned over and attained a firm set. For best results, use a high quality oil-based paint, or if using a latex paint, prime first with a high quality oil-based primer.
Important Note: Do not thin glazing compound. Do not apply when air or sash temperatures are below 40ºF (4ºC). Do not use on plastic window panes, insulating glass units with an organic seal, any window pane over 48" (1.22 m) in length, or metal sash with rabbets over 1-1/4" (32 mm) wide. Also not recommended for stained/leaded glass projects. Clean tools immediately after use with mineral spirits.