So, then We're talking about 1" Masking Tape painted Black...
The tape looks like regular 3M light tan, paper based masking tape, then painted black. There's 1 1/4 to 1 1/2 wraps around the motor. I like to put the end underneath and give it a bit of help to stick down with a dab of contact cement. To seal and make it water resistant, spray it with Scotch Guard (after you mask the edges with blue painter's tape).
Jim
I should read my own wright-ups in the library.
AMK B-11665, a 2 inch wide (maybe 1 7/8) cut to 1.0 inch.