This one is essential, IMHO.

Found a new (?) product called "Supertape", a silicone tape that
sticks/bonds/seals to itself.  It doesn't feel sticky on it's own, so it's
fairly easy to work with. It has a backing plastic that you remove as you
stretch (probably 50% or more) and roll it on.

It is tough, pliant, stretchy and heat and chemical resistant, perfect for
those tape repairs were duct tape is not good enough. I just love it.  I
repaired amongst others a blown EGR hose on my Passat, where it's hot,
subject to chemicals and prone to pressure fluctuations.  No problems yet,
some 5000 kms later.

I'ts good for a number of things, but what interests me particularly in this
product is as a spare part/tool for semi-permanent repair to leaking hoses.
Thankfully I havn't had to use it that way yet.

Alias Fred aka Bleu Schtroumpf