Scotch 665 Double-Sided Office Tape, 1/2 Inch x 900 Inches, 1-Inch Core, Clear, 8 Rolls . Permanent adhesive on both sides. A no-mess alternative to glue for light duty attaching and mounting tasks. Scotch Double Sided Office Tape is coated with permanent adhesive on both sides. Linerless, long-aging tape won't dry out or yellow.