As seen in Military + Aerospace Electronics: Today’s particle-filled silicones are designed to balance cost competitiveness and compressibility with electrical conductivity and shielding performance. Gasket
EMI O-rings are donut-shaped gaskets that combine environmental sealing with protection against electromagnetic interference (EMI), a disturbance that limits the effective performance of electronics and electrical equipment.
As seen in Rubber World: The silicone shortage highlights the risk of over-reliance upon a single supplier of specialty bases, especially when comparable off-the-shelf offsets