There is no necessity to replace this seal each time the cap is taken off.
Adheres with high quality 3M 4011 acrylic foam tape
If the height of the gap is .250" or less, just install one Extruded Solutions (ESI) high quality EPDM rubber truck cap seal on all 3 rails (see product description for choices)
Measures 1" width x 1.125" height and fills a height gap from .488" to 1" from the sidewalls to the front rail, when mounting a truck cap or camper shell.
If the height of the gap is .251" to .487" install Front Rail Seal (ASIN: B00C0WVV72)