Alchemy is a water-based jewelry sealer that creates an invisible barrier that protects your jewelry from tarnishing, while also protecting your skin from discoloration and irritation. Simply put: Alchemy keeps jewelry from turning your skin green or making you itch. If your customers complain about not being able to wear earrings because they make their ears itch, Alchemy is a great solution for them. If your customers complain that costume jewelry turns on them and they want to keep it looking new for a long time, Alchemy is a great solution for them. When Alchemy dries, you can't see it, feel it or smell it. We aren't sayinng it's magic, but we are saying it's awesome. Just reapply as needed.