Note: boiled linseed oil dries faster but contains metallic driers (cobalt or manganese) and is not traditionally used for glazing putty. Most hardware store “window putty” today is actually an oil-based glazing compound with added solvents and driers. It works fine, but traditionalists say real slow-drying linseed putty is more authentic and longer-lasting for period windows. The Bottom Line Window putty is made of chalk and linseed oil — a simple, brilliant material invented centuries ago and still hard to beat for wooden windows. Next time you see an old window with that smooth, painted slope of putty holding the glass, you’ll know exactly what it’s made of. Have you ever reglazed a window with traditional putty? Let me know in the comments below!
If you live in an older home or are restoring traditional wooden sash windows, you’ve probably heard of window putty (also called glazing putty). But what exactly is this squishy, clay-like substance that holds glass in place? what is window putty made of