Door Hinge Caulk??

I recently removed the door hinges on my Duster to rebush and repin.There appears to be some type of caulk or putty around where the bolts come through the pillar posts to mount the hinges to seal moisture out of the passenger compartment . Is this a special caulk or could I use some type of silicone to do the same job???

Its a mastic, you can get it from the local body shop supply store.