Weeds between brick
My townhouse's yard consists of laid brick with built up brick beds around the perimeter. The townhouse is at least 20 years old, I moved in 8 months ago. It appears as though there used to be some sort of concrete grout between the bricks, although most of that has worn away and replaced by dirt and weeds.
I have been spraying Round Up, but that only kills the existing weeds which are then replaced by new weeds in a couple weeks. I'd hate to use any sort of total vegetation killer due to my fear of tracking it in the house and hurting my pets.
I had the idea to use concrete caulk to reseal the gaps between the brick (at least 1/4" wide). Could something like this work? Does anyone have any other suggestions short of removing and relaying the bricks?
Thank you for any responses!