Molded silicone components for pharmaceutical, biopharmaceutical, sanitary process, and laboratory applications consist of stoppers and sealing systems for carboys and vessels, bottles, laboratory equipment, and process and storage containers. Components are made from Class VI, platinum-cured silicone elastomer for the utmost in purity. Components are biologically safe and work with receptacles of glass, metal, or plastic. The components resist cracking and particle migration and provide a secure, sealed environment. Customization is available and includes colors or special markings for identification purposes.