Our old concrete driveway has developed some fairly wide cracks - up to a
quarter inch or so.
I am looking for recommendations on filling these cracks to keep water out
and eliminate weeds growing in the cracks.
The City fills cracks in the asphalt roads here with some liquid asphalt
(tar) stuff they have that is heated to liquid state. It works well on the
asphalt road surface, but I don't have the equipment to apply that to my
driveway.
I don't care much what the crack fill job looks like, just want to seal the
cracks.

Anyone know of any good, fairly permanent fixes for the cracks in concrete
driveways?

Thanks!