Cracks in the expansion joints in a concrete driveway can cause problems if they’re not sealed properly. Cracks can allow water to seep under the concrete, creating a void that can cause the concrete to sink.
To solve this problem, use a masonry blade on a circular saw to clean out the crack, then fill it with a bead of silicone caulk that’s made especially for concrete. The caulk will seal the expansion joint and keep water out.
Watch this video to find out more.
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