Abstract: RF-absorber assemblies for assisting PIM hunting at cellular base station antennas. An RF-absorber panel section includes a non-absorbing spacer layer adjacent to an antenna under evaluation. An RF-absorbing layer is positioned adjacent to the non-absorbing spacer layer. A low-PIM RF-shield layer is positioned adjacent to the RF-absorbing layer, so that the RF-absorbing layer is positioned between the RF-shield layer and the non-absorbing spacer layer. RF-absorber panel assembly kits include RF-absorber panel sections that removably attach to each other and to an assembly cover, which removably attaches over a panel antenna. A cylindrical assembly for a multi-directional antennas includes tapered RF-absorber sections within a cylindrical RF-absorber. An iris allows directional PIM hunting with the cylindrical RF-absorber. A PIM hunting procedure utilizes a full-perimeter RF panel assembly for directional PIM hunting.