KERDI-SEAL MIXING VALVE SEAL 4-1/2" (10) Product Code: KMSMV10235/114 Product type: valve seal Diameter: 114 mm (4-1/2") Package quantity: 10 Schluter-KERDI-SEAL-PS and Schluter-KERDI-SEAL-MV are prefabricated sections of KERDI with over molded rubber gaskets that are used to seal pipe protrusions through the KERDI waterproofing membrane (e.g. at showerheads and tub spouts) and protect moisture-sensitive backing panels at the mixing valve.