Hi Art,
I don't think Micafilm has been available for a few years now, but if you have some I would check and see if the Micafilm in question has the adhesive back or not. (cut a small piece off and try it like regular medium heat plastic covering). I believe it was available both ways. If it has the adhesive back then use the striped can; if not, the other.
It seems odd that Coverite produced both Micafilm and Balsarite yet dosen't recommend it for their own covering.
Peter
(I haven't read the label for many years)