This product can be used to insulate PEX supply lines in attic spaces. You may consider Armaflex pipe insulation, as it is more flexible to install over PEX piping.
For this application, I would recommend the 1" insulation, which has a nominal Inner Diameter of 1-1/8". This 3/4" pipe size has a nominal inner diameter of 7/8" and would not fit a 1.1 inch tripod leg.
I would not, but if you do only at a very low temperature. A 60W incandescent bulb when very close melts the material.
Sure, but it will deteriorate over time. We have successfully buried it to cushion water PVC pipe from rocks.
nashua 555 hvac flexfix tape. I've used it for years and never had it fall off.
I've had this on hot water base board pipe and it did not melt and I have my furance set at 185 degrees
If it is exposed to the sun I doubt it would last long.
It definitely will protect against ambient heat temperature or radiant heat from the sun. The exterior of the foam may heat up but does not transfer through the insulation.
The polyethylene is water tight but when you cut the slit to install the insulation that creates a small area for moisture to penetrate. If that is a concern Home Depot has an insulated tape that you can over wrap the insulated foam with.