The brand name isn't important, just that it is compatible with your roof material. If the roof is EPDM, it must be EPDM compatible. For TPO or fiberglass or metal, most types of lap sealant will work fine.
For some work a self-leveling sealant is easiest, but for small holes or around brackets it doesn't make much difference.
Dicor is always an excellent choice, and Alpha Systems ranks right up there with it.