Alix wrote:
I find that large diameter heat shrink sleeving which is large enough to
passes over wide parts of my cables does not contract enough to hold the
actaul cable when they are heated heated.

Is it possible in the UK to buy just one or two rolls of heat shrink
TAPE? I mean something similar to regular self-adhesive PVC insulation
tape but which contracts when heated. Does such a thing exist?

My web searches such as this one at Farnell's http://snipurl.com/skla
return heat shrink SLEEVES which is not what I want.

Glue-lined zipper heatshrink tubing. You open up the tubing, lay in the
cables, zip the tubing shut and apply heat. Aftrwards, cut off the
zipper along its length with a craft knife, to leave a round cable.
Handy for all those time when you can't get a tube over the end
(especially in the middle of a cable run, replacing a section of damaged
cable..).

The result is a totally water and air-tight cable assembly - as the glue
exudes out of the ends of the tube to make a perfect seal.

But rather over-kill for inside a PC. Spiral wrap is cheaper and more
flexible - as it allows all the cables to be wrapped together, with
cables exiting from the spiral wrap at intermediate points. It comes in
a range or diameters.

--
Sue