Topper problem

The black rubber sealing on the bottom of my topper has peeled away.. I was wondering if anyone had any brands for replacing this! Thanks

 

Any place that sells toppers has this tape, or you can get it from home depot if you are referring to the tape between the topper and the bed rails

 

I use 3M 03420 1-1/4 inch camper tape and am 100% satisfied with it. It seems to be the only tape that doesn't squeeze out from between the shell and the bed side. Used it since around 2001 or so without problems. MOF I just received a new roll ($8.24 including shipping) last week. Sure beats getting it at an auto parts store and paying $19 for it... The crap from FrostKing squeezed out after a year or so.