Could very well be. The Kaptan comes as sheets of foil, as self adhesive tape, etc.
I believe it's also used as solder mask and as protection during manufacturing.
See this partial wiki text:
Kapton tape (yellow) used to insulate the leads of a battery cell in a bluetooth headset.
Due to its large range of temperature stability, and its electrical isolation ability, Kapton tape is usually used in electronic manufacturing as an insulation and protection layer on electrostatic sensitive and fragile components. As it can sustain the temperature needed for a reflow soldering operation, its protection is available throughout the whole production process, and Kapton is often still present in the final consumer product.