consists of silver-plated copper particles dispersed within silicone elastomer. CHO-SEAL 1270 offers shielding effectiveness greater than 70 dB from 100 MHz through 10 GHz. Gasket has 35 ±5 Shore A hardness and 9% compression set. Available forms include compression molded sheets, die-cut parts and custom molded shapes with thickness range of 0.01 to 0.125 in.