Hatch leaking

The hatch on my crx is leaking. Should replacing the weather striping on the jam stop this? And the last question, can I go to autozone or pep boys for the stripping, or would I have to go to the dealer?

my hatch used to leak fairly bad....to the point i had to drill 6 or more holes in the tire well. i ended up replacing the weatherstripping and i got mine from advanced auto/autozone. that helped a little but it still elaked. ended up also having to re-glue the hatch window at the very top under that black trim.