Packer elements are down-hole sealing elements that isolate sections in oil and gas wells. These components must be able to withstand hostile environments, and also be of an elastomer that is compatible with the media being sealed. Several types of packers exist. Mechanical packers require hydraulic or pneumatic actuation. Swellable packers consist of an elastomer that diffuses the media across the packer until it achieves the inside diameter of the hole. When the packer's internal stresses reach equilibrium, the packer has created a sealed annular barrier.