6 | 9
Using Coax-Seal® to waterproof a coax cable splice
This is a new space age plastic material which will quickly and effectively seal all types of coax cable
fittings. COAX-SEAL stays flexible for years thus insuring moisture proof connections, good SWR and
long coax-cable life. Make sure fittings and coax cable are clean and dry before applying. Peel six
inches of COAX-SEAL and wrap around by winding from coax cover toward fitting with one half
overlap with each winding.
Shown below is a short pigtail of RG-59U coax cable terminated in a Snap and Seal "F" connector
which is then joined to a female-female adapter or barrel connector. The antenna shown is an Active
Marine TV Antenna as used by the US Navy.
The next few photos will show how this barrel connector is used in a splice and how it is waterproofed
for marine use.
The second cable with connector is
attached to the barrel adapter and
wrench torqued. The connector on the
right has an O ring in it's mouth and it
is sealed to the coax internally with
silicone grease.
This shows the cable from the
amplifier to the barrel connector.
