3M(TM) General Purpose PTFE Skived Film Tape 5181 Gray, 3/4 in x 36 yd 6.5 mil, 48 per case Bulk 3M(TM) General Purpose PTFE Skived Film Tape 5181 Gray, thicker backing version of Tape 5180, PTFE film with a silicone adhesive, slick surface tape with good resistance to most chemicals 3M(TM) General Purpose PTFE Skived Film Tape 5181, thicker backing version of Tape 5180, skived film tape for conformability, slick surface, chemical resistance, and self-lubricating properties. The tapes' easy-release surface helps minimize buildup and cleanup of sticky materials or inks on rollers, plates, and belts. You also will find these tapes ideal for sealing or masking to protect contoured surfaces from harmful chemicals and wear.