This pure Teflon® Lab-Thread tape contains no adhesive, yet does a superior job of sealing small apertures, conforming to irregularities of surfaces, threads and joints of all types. Eliminating the need for lubricants and vacuum greases, Teflon® Lab-Thread tape can be used on ground glass joints, desiccators, bell jars, freeze-drying equipment, etc. A wrap of Lab-Thread tape provides a vacuum tight seal as well as easy release even after long periods. “Freezing” is totally eliminated.