3M 92 Polyimide Film Electrical Masking Tape - 3M 7100116855, 3M 92 Polyimide film insulating tape with heat-hardened silicon adhesive. Specially suitable for the masking of gold contact fingers during flow-soldering of printed circuit boards. 3M™ Polyimide Film Electrical Tape 92, MC26, 9 mm x 33 m