It will block almost all of the heat being produced by the pipe.
This product is made to handle the high temperature of this type of heat.
This question was answered already in responses of the 1-1/2” size.
Yes it is ok to use this pipe insulation for this situation.
This will help reduce heat coming directly off the pipe but will still be warm to the touch.
It is 5/8" inside diameter for 1/2" copper pipes.
Yes you can use in common spaces, as long as the seams, between pieces are taped closed.
They are packed in a case pack of 33. however you may purchase any quantity you need.
No, this is a fiberglass product and will absorb water. It will not work outside in the elements.
Not familiar with the Easyheat tape, but this is fiberglass insulation, so should be fireproof.