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TACK: stickiness, adhesion. Masking tape comes in low-tack and high-tack varieties; high tack tape may peel off paint underneath it when removed. E.g 3M 2090 is a lower tack tape that's blue in color, and 3M 233 or 233 plus is a green tape that pros often recommend for resin/glassing work. See also, Tack free.