Can't say that I have ever tried to use this stuff as masking tape, but I do know from experience that this stuff sucks if you need to use it on a surface with the slightest curve at all. The adhesive backing on this stuff seems to be too weak to hold the tape down unless the surface is perfectly flat. Because of this, I would be reluctant to use it as masking tape. But, you can always try it out on some scrap first and let us know the results. SC