The old expansion joint boards in my driveway are rotting away and now
grass and weeds are growing in them. I tried poison but it just ended
up poisoning my lawn. I have seen some kind of caulk like stuff used
around buildings for the purpose of filling in the joints. What is the
stuff called and who sells it? I'd like to get the good stuff even if
expensive as opposed to off the shelf Home Depot junk.
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