How best to seal redundant cable gland?

[CJ13]

We’ve just removed our analogue radar from the mast and have a redundant deck gland where the cable enter the boat.
I could just cut the cable and apply plenty of sealant, but there must be a better way to seal the gland.
Any simple suggestions?

 

[Boathook]

If it is an index gland they came with a blanking cap to do the job. A picture of the gland would help for ideas.

 

[CJ13]

The gland is 15years old, so I certainly don’t have blanking plug, but I’m happy to buy (or make ) one if available?
Photo attache.

 

[Daverw]

Off eBay get a suitable short length of plastic rod the OD of the cable that was there. Replace the old cable with this and job done

 

[Boathook]

The gland is 15years old, so I certainly don’t have blanking plug, but I’m happy to buy (or make ) one if available?
Photo attache.

I would try to cut a small disk to fit inside the gland nut and also a bit of sealant and put the nut back on. Leave a bit of the cable in the rubber seal as.

 

[jim.howes]

Hi I made a blank for my redundant fuel filler. A round 2-3 mm thick aluminium disc from ebay use gland to mark holes, drill holes, counter sink holes,prime with etch primer then spray whatever colour you require (white). Fit using mastic and self tapping stainless steel screws. It makes a permanent and clean fixture.

 

[James_Calvert]

The gland seal is a conical shaped bit of rubber with a hole in it.

I'd make up a wodge of self amalgamating tape and screw the cap tightly down onto it. That should get the wodge into the right shape for a blanking cap. I might then reinsert this with a bit of silicon grease around it. This is assuming you might want to reuse the gland sometime.

 

[kacecar]

I have found that as long as the rubber gland itself isn't too old (damaged, perished, w.h.,y) then merely fold a piece of PVC insulation tape such that it sticks to itself, cut a disc of the stuff sized so that it is a tight fit when you tuck it inside the cap of the gland, and then screw the cap back on quite tightly. You'll be able to see part of the disc through the hole in the cap so the colour choice is yours. UV gets it eventually but it'll probably last a couple of years.

 

[CJ13]

Thanks for all the advice.
I’ve found a suitably sized dome head stainless steel bolt, that I’ve been carrying for many years, which with a bit of sealant should be more than adequate.

 

[nrcoyle]

Looks to me like a standard cable gland assembly screwed into a base.

If the cable gland can unscrew from the base then there are caps with the equivalent thread available which can be used to seal, like the link below,although I can't remember if the ones on my boat were PG7 or PG9 in size.
HPP9 BK080 | Alpha Wire FIT PG9 Blanking Plug, Plastic, Threaded, IP66, IP68 | RS Components