This is not the correct type of pipe insulation to use. The Frost King Fiberglass Tubular Pipe is made for this type of situation
It is 7/8".
It is 1/2 inch wall thickness
Use rubber foam pipe insulation if you need to insulate an air conditioner unit.
This fit snugly does not have adhesive opening so I do not think it would work well
Question for Frost King Weatherstrip Expert: How about for over heat tape on standard copper water pipes, both hot & cold?
Yes these can install over copper pipes.
Keep your pipes close to the interior wall and this may help. If the space is below 32 f no amount of insulation will keep standing water from eventually freezing.
180 f 82 c maximum temperature.