Simple Way To Waterproof Coax Connection

[Riverman]

Take an ordinary water hose washer and slide it onto your SO239. You’ll find it is a perfect snug fit.
Then simply screw on your PL259. Bingo! No more sticky coax seal, etc.

 

[binrat]

l like it, simple and cheap.

 

[fourstringburn]

Interesting idea.

I use rescue tape. It is self vulcanizing and easy to remove with no residue. However it would be difficult to use with an L-bracket but it works great if the connector is more exposed like in this pic.

 

[Eldorado828]

I use self fusing silicone tape and leaves no residue either but like above it is tricky in a tight spot.
I'll keep your idea in the memory banks though