Warm the old putty with a heat gun on low heat (or a hair dryer). Once it softens slightly, use your putty knife to scrape it out. Work parallel to the glass, not toward it.
For $20 and a few hours, you can extend the life of a historic window by 30 years. That’s a win for your wallet, your home’s character, and the landfill. window putty repair
The good news? Repairing window putty is one of the most satisfying (and budget-friendly) DIY projects you can tackle. For the price of a few tubes of caulk, you can stop drafts, prevent rot, and save hundreds on replacement windows. Warm the old putty with a heat gun
Happy glazing, and may your putty knife never slip. For $20 and a few hours, you can
Here is your complete, step-by-step guide to window putty repair. Window putty is a sacrificial seal. It protects the gap between the glass pane and the wooden sash. Over 20-50 years, exposure to sun, rain, and extreme temperatures turns flexible putty into a rock-hard, cracked, or powdery mess.
