Compositions and devices for gas sorption are provided that can be activated just before their use, which hence do not need storing under inert atmosphere during storage and transportation. By adding liquid organic polymers to liquid silicone rubber compounds as described herein, coatings for air bags that show increased retention of the inflating air have been discovered. An elongated support is mounted to the rod. Filter tuning and inductor Q compensation over temperature are performed on chip. The assembly may be readily formed by molding of the filtration element into the oil entrance in an injection overmolding process.