200 000 centipoises platinum catalyzed addition cure 100 percent solids solventless liquid silicone rubber lsr formulation the lsr coating should be as thin as possible only as thick as necessary to achieve the desired function although a variety of coating thicknesses of silicone rubber to serve a variety of functions are contemplated by the invention a coating thickness of about 2 50 mils is preferred the lsr formulation is composed of commercially available a and b components that are mixed in a specified ratio typically 1 1 or 10 1 each component contains vinyl terminated polydimethylsiloxane polymers and may contain fumed silica as a reinforcing filler and or extending fillers typically one component for instance the a component contains the catalyst and the b component contains a crosslinking agent and an inhibitor that is removed by heating to allow the lsr to cure into a solid rubber the lsr formulation may incorporate pigments and or other additives the membrane thus coated is completed by passing it through a coating oven or other heating device raising the temperature of the coating sufficiently to drive off or decompose the inhibitor allowing the lsr to cure into a solid rubber alternately the web may be coated with a silicone rubber incorporating an organic peroxide catalyst u201c heat curable u201d silicone which may be applied from a solvent solution dried if necessary to remove the solvent and heated appropriately to effect a cure or with silicone rubber incorporating an atmospheric moisture activated acetoxy cure system u201c one package u201d rtv once again perhaps from a solvent solution dried if necessary to remove the solvent and allowed to remain exposed to moist air.