aluminum tinfoil and scotch tape
No, it doesn't insulate very well either thermally or electrically.
INSULATE
At poo
Duct tape or aluminum tape either can with stand the heat
Get some tape and tape it down OR just tuck it under.
Duct tape!
Typically electricians use a type of tape known as electricians tape. This can be bought at any hardware store or dollar store, and is designed to insulate and shield electrical wires properly.
A search of the internet has allowed me to come up with 2 answers to your question. The first is 3M Aluminum tape. This company offer a highly rated aluminum tape that is moisture, heat and chemical resistant. The tape comes in all different sizes but is the more expensive choice usually costing anywhere from $130.00 to $250.00. Then there is the dramatically cheaper Intertape Aluminum tape. This company offers a fairly reviewed aluminum tape that while does not possess all the things 3M tape offers does offer a durable, flexible, and affordable alternative. The average price of this tape is $20.00 but some hardware websites offer it at a reduced price.
You take a tape measure and measure it.
To reduce the unwanted signals.
Yes, it is fine.