On Sat, 01 Jul 2006 13:54:21 GMT, "Dorothy Bradbury"
had this to say:

The only self-amalganating tape I've ever come across is
poly-isobutylene (PIB) which is rubbery. It isn't actually sticky, but
does have a rubbery texture. Also, it's not very durable, so it's
normal to further protect it if necessary.

That's a fourth :-)

There is a sticky version - basically a low temp cold flow adhesive,
if you leave the roll for a few years it ends up a right mess. A very
gummy adhesive, stretchy thin PVC to conform to irregular shapes.

Surely if it relies on glue to hold it together, it can't be
"self-amalgamating" ?

--
Frank Erskine