Copper Reinforced Silver Plated Copper filled Silicones are of the highest performers for Shielding Effectiveness. These elastomers are highly conductive, and meet levels of shielding that are not able to be achieved by most conductive elastomers. Specifically designed with an expanded copper foil within the profile to reduce cold flow. Recommend for applications that have controlled environments, due to some incompatibility with dissimilar metals with regard to galvanic corrosion. These materials are 80 durometer.