ECCOSTOCK^® HiK500F is a series of controlled dielectric constants materials ranging from 3 to 30. These materials are usable up to 204°C with intermittent temperatures to 260°C.  Dielectric loss is low and the accuracy of the dielectric constant is ±3% for K<16 and ±10% for K>16.  The material does not support fungal growth per MIL-STD-810E, has low water absorption and low outgassing for space applications.

Typical applications are for reducing the overall size of a waveguide by increasing the dielectric constant, cavity tuning probes, A patch antenna is a narrowband, wide-beam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating substrate. Some patch antennas eschew a substrate and suspend a metal patch in air above a ground plane using dielectric spacers; the resulting structure is less robust but provides better bandwidth.patch antennas, and dielectric support pieces.