Profilitec SHOWERTEC Pre-Sloped Shower Tray The Showertec STC-TRAY range of pre-licensed trays are designed to work with the STC-SD central drain, which has a vertical discharge and ABS and PVC flanges. They are built of EPS, to which a waterproofing membrane has been put; this, along with the Foiltec membrane, the corners, and strips, render the shower impervious to water and steam. Features EPS shower tray with waterproof Foiltec membrane in pre-glued Polyethylene Available in 5 different sizes they can be combined with vertical drain systems in PVC and ABS It is particularly suitable in shower stalls, preventing humidity from spreading to adjacent rooms Tested with vapor test proving high resistance, making it a great option for wet steam rooms