3M electrical tape 44 is excellent for economical, general purpose insulation, anchoring and banding in motors and transformers. It combines the high dielectric strength and edge tear resistance of polyester film and nonwoven polyester mat for a conformable product with great puncture resistant and electrical properties. - 3M electrical tape 44 is a low-halogen, combination polyester film/polyester web film coated with a rubber thermosetting pressure sensitive adhesive. This UL recognized conformable tape is puncture resistant with excellent electrical properties.