In article emailer.net,
Carl D writes:

I saw some "heatshrink sleeving" in assorted colours in B&Q, but
no instructions on the outside of the pack. Does anyone know how
much heat you need? A hair-dryer?

Tiny hot air guns are used in the lab. Hair dryer is not hot enough.
Blowtorch is often used outdoors, but you don't put the flame on
the sleeving -- you wave it some distance away so temperature is
well below that of the flame. I sometimes do it over a gas hob
(again, some distance above the flame). Can also use the hot side
of a soldering iron, but that's fiddly to get full shrinkage.

(Not a blowtorch!)

--
Andrew Gabriel
Consultant Software Engineer