Closed Cell Silicone Sponge Washers - Black, White And Red (Riox).

Silicone sponge washers from RH Nuttall are often supplied to heating and boiler manufacturers. Silicone sponge is a high-end, closed cell, material designed with one function in mind. Silicone sponge washers are used as hob seals, boiler seals, lamp seals and heater seals to stop any transfer of heat from one surface to another. Compression within the silicone sponge membrane allows for two mating surfaces to be tightened together creating an airtight and efficient seal.