For permanent fixes on exterior wooden frames, traditional linseed oil putty is superior . Synthetics are useful for interior stops or temporary repairs.
Dip your knife in linseed oil or water. This prevents dragging and creates a glass-smooth finish.
Last updated: As of today, linseed oil putty remains the professional’s choice for preserving historic and quality timber windows.
Press glazing points (or small panel pins) into the frame every 8–12 inches to hold the glass while the putty hardens.
Putty for window frames is a simple yet essential component of window maintenance and repair. By understanding the benefits and types of putty available, you can make informed decisions about how to care for your windows. Whether you're a DIY enthusiast or a professional contractor, putty is an essential tool in ensuring the longevity and efficiency of windows.
: The classic choice for wooden frames. It is durable but takes several days or weeks to cure before it can be painted.
Never use standard “spackle” or water-based fillers on external windows. They will crack within one season.