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C-645 is a line of outdoor isolation foam sheet material, comprised of urethane foam and a lossy carbon loading. C-645 absorbs RF microwave energy across 700 MHz through 3 GHz. frequencies.
C-645 has proven to be ideal for PIM reduction and isolation between antennas; it can also be used to cover fences to de-couple adjacent antennas, and shield or isolate equipment. The open-cell structure permits airflow freely through the absorber. When used outdoors, rain will also freely drain from the product.