I need a solution to eliminating moss and small weeds growing in the cracks of my pavestone patio and sidewalk. Any ideas? The more permanent solution, the better. Thanks.

I have been spraying either 10% or 20% vinegar on the weeds that grow in the cracks of my driveway. So far it has killed every one of them and they have not returned. I got the vinegar at a feed supply store. I see that Lowes now sells it also. It is not very expensive. Give it a try and let us know how it works.