In article ,
Art Todesco wrote:

What I would do, although I did 31 years
in the Telco business, is to go
to Lowes or Menards, etc. and get some
splice beanies. These beanies
have a place to push the 2 ends of the
broken wire, same color. You then
squeeze the beanie and it cuts the
insulation and connects the 2 together.
Some even have some silicon goo to make
it more waterproof. They also
have cylinders where you shove the
spliced wires and apply a sealant.

It'll fail.

All the silicon goo/caulk/sealant/whatever isn't even CLOSE to the encapsulant
used for "official" buried splices.

In 34 years I've lost count of all the DIY buried splices I've dug up. Sorry.
--

JR