It's called 'adhesive lined heatshrink'. Yes, it's available, though a reel
of the Good Stuff (Raychem) costs a small fortune.
They also make custom boots to fit various standard connectors.

Probably best bought as surplus or from a trusted seller who bought reels
from military, autosport or aircraft industries. The short lengths
available on ebay are often inferior grades. A heatshrinking tape is also

Hams tend to use self-amalgamating tape, as Phil recommended.

On Sat, Feb 10, 2018 at 12:41 AM, Hal Murray <>

> said:
> > Generally speaking, you can seal most RF connectors quite nicely with a
> few
> > layers of self-amalgamating tape and a layer of PVC tape over the top of
> > that (to protect from UV).
> Many years ago, I picked up a chunk of scrap the local cable TV installer
> had
> left on the ground underneath the utility pole out in front of my house.
> It
> was a chunk of industrial strength shrink wrap with a layer of goop on the
> inside.
> Is that stuff available in small quantities?  Would the antenna withstand
> the
> necessary heat?
> How do hams seal antenna connectors?
> --
> These are my opinions.  I hate spam.
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