Cross STUFF -- DIELECTRIC WATER PROOFING FILLER Grease
is an ultra low density, macroscopic foam paste filler specifically formulated for internal weather-protection of all types of coaxial connectors. It prevents moisture infiltration by occupation. One 2 ounce tube contains 3.2 cubic inches by volume. This will accomodate about 100 "F" connectors. STUF reduces insertion loss especially at UHF and above.