3M’s latest masking tape, ScotchBlue Advanced, has a moisture-activated additive that reacts with the water in latex paint to better seal along the tape edge. Since the adhesive treatment can’t be rinsed or scraped off the tape, the rolls require no special handling, says the company. The tape comes in multi-surface and delicate-surface versions starting at about $5 a roll. 3M, 888/364-3577, scotchblue.com.