ECCOSORB^® QR-13AF or (Antimony Free) is an environmentally friendly UL-94-HF-1 rated fire retardant version of the popular ECCOSORB^® LS foam.  Similar in design yet stiffer in nature due to the flame-retardants used, ECCOSORB^® QR-13AF will generally not dust or flake off.  It is not weatherproof, but can be supplied with a special coating called CERSEAL (part at right) for outdoor use or where the absorber may come in contact with fuel, lubricants, or hydraulic fluids.  It can be easily cut with a knife and held in place with either a Pressure Sensitive Adhesive (PSA) or attached with a liquid based contact adhesive ECCOSTOCK^® 13-111.

ECCOSORB^® QR-13AF is designed for the suppression of cavity resonances in shielded high-frequency modules and the absorption of parasitic radiation emanating from high speed electronic circuits.  It can be used to line the interior of a cavity to lower its Q in RF amplifiers, cabinets containing microwave devices or computer housings requiring a high UL rated absorber. It can also be used for the isolation of antennas by IL - Ratio of input power to transmitted power. Loss of power passing through a material which includes reflection and attenuation.insertion loss.