What makes it different to me is that it is not C130 tape. For me, C130 is the gold standard for spec grade installs.
Don't get me wrong, I'll wrap a split-bolt lickety-split with mastic tape if that is what I have on the truck.
Sorry everyone. The tape is not C130 (as in the Hercules cargo plane). It is 130C (as in 130 degrees Celsius.)
The tape I'm referring to is 3M Scotch 130C Linerless rubber splicing tape. There is a product info sheet online just like the one 480sparky posted for the mastic tape.
I've used the rubber tape that has the liner, but the liner keeps getting in the way. But here in Texas, the liner keeps the tape from melting into one ball of rubber.
In the Navy, we were taught to wrap joints or splices with friction tape, then 130C rubber tape, then vinyl tape(super 33+) i.e. the so-called "monkey nuts".
The mastic tape is great, except when it is time to cut it off to undo the splice (when, say, sending a motor to the rewind shop). The mastic melts into the lugs and hardware making it difficult to remove. The motor junction box T leads and supply conductors may wind up shorter in the frustration.