3M Scotch 218 Fine Line Premium Masking Tape, Green, 3/32 in x 60 yd x 5.0 mil, High Performance Polypropylene Tape, Pack of 1

This paint is super thin in width and wonderful for masking watercolor paintings- it left sharp lines and removed from watercolor paper *fairly* easily (I left it on for several days and it tore one tiny area, but that's fairly standard.)One thing to note- the tape is rubbery plastic, not crepe-y paper, so it handles a bit differently when applying and removing. But it works wonderfully for clean and sharp lines, even with very fluid washes.

Not flexible for tight curved lines.

Use this product all the time for my work

Great fine line tape. Flexible enough and strong enough. Not too thick.