This stuff is great! I have used it for masking and it sticks well, but not too well. You can cut it before or after application with a sharp #11. It works much better for me than parafilm and is MUCH cheaper. According to some others who have used it, it may leave some residue on NMF finishes, but I have not had this problem on SNJ.
I have also started using it to seal my paint jars after opening. Keeps the threads clean and seals tighter than just the lid.
No connection, yadda, yadda.