Dap 18021 Concrete and Mortar Watertight Filler and Sealant - Gray 10.1-oz Cartridge (18096). Sold as 3 Pack

At 45,000Hz of ultrasonic energy, the Ultrasonic Cleaner produces microscopic bubbles that dislodge contaminants that are harmful to your jewelry (and other metal staff) like sweat, oils, and lotions. In this process called “cavitation”, nanobubbles are deployed to get into even the most intricate of designs and clean up in the gentlest of ways.