Glass Pro Stained Glass Putty is a fast-setting stained glass cement that hardens, strengthens and waterproofs leaded glass windows and panels. The putty leaves a rich black tone on the lead, which can be buffed to an antique pewter tone. Sold by 1 lb. jar.

Instructions:  Using a fid, the cement is gently forced beneath the face/leaf of the lead came filling the space and securing glass into place. Apply whiting to start the hardening process and begin cleaning the panel. Traditionally, both sides of the leaded panel are cemented.