Pull off the white protective wrapper from the test unit and discard. Be careful not to touch the gasket material if possible, since it is rather sticky. The gasket is special water vapor proof gun-grade sealant designed to adhere to the moisture, alkaline environment of the slab. Immediately center over the dish unit and seal it to the slab. With the new Vaprecision Dome Press (patent pending) the sealing of the dome to the slab can be done in seconds with total reliability. See next frame for more details.