The process of puttying or cementing is an essential part of the lead came construction method. It waterproofs your panel and adds strength to its structure. However, poor execution of this step can mar the beauty of your creation, leaving the glass clouded and the lead lines dull and imprecise. This finely ground whiting powder, sometimes called whitening powder glass or whitening powder for stained glass, absorbs oils, removes fingerprints, and clears residual glazing compound quickly, easily, and effectively. Simply sprinkle a small amount over your stained glass panel and rub both the glass and lead came vigorously with a cloth. Follow with a natural fiber brush, and the leads will darken and gleam while the glass shines. Widely used in stained glass studios and metal shops, this 100% pure calcium carbonate is safe for daily use, though wearing a dust mask during scrubbing is recommended. The 32 oz. screw-top plastic bottle keeps the powder dry, secure, and easy to access, minimizing mess and simplifying your workflow. Whether you're adjusting putty consistency or cleaning a window after installation, this versatile stained glass whitening powder delivers clean, crisp lines and a professional finish every time.