How to mix putty for your leaded stained glass window projects! ✨ In leaded stained glass window building the artisan will brush putty underneath the flange of the lead. The putty fill the space in the channel, seals the window and strengthens the lead. You can make your own putty like you see here in the video or you can get a pre mixed putty. I like to use the premixed putty when I am doing a small repair or custom and I’ll typically make my own for a larger project. #stainedglass | Lucent Gla