We have used foam weather seal for many years for many different purposes.  Today I installed this roll in a Sidebar / China Cabinet to block the light seepage in between the cracks in the doors.  One roll perfectly completed the job.  The white peel off tape protector is on the NON STICKY side of the foam. This means that the end of the roll about 6 inches of foam seal is wasted as it is firmly stuck to the cardboard roll.  If the manufacturer put a layer of the tape protector on the cardboard tube they wouldn't have this waste.