How-To Videos

How to Seal Expansion Joints in a Concrete Driveway

By: Danny Lipford

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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2 Comments on “How to Seal Expansion Joints in a Concrete Driveway”

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  • Eric B. Says:
    April 1st, 2016 at 2:52 pm

    In all my research on this topic (filling control/expansion joints in concrete slabs), it seems that industry leaders (Sika, Titebond, Tremco) all recommend Polyurethane sealants, as well as the use of a foam backing rod to prevent three-side adhesion, as well as to ensure proper bead shape (hourglass). You might consider revising this video to include those details so that people aren’t getting “bad” (not really bad, just not up-to-date with industry standards) information.

  • Eddie Says:
    March 25th, 2013 at 3:32 pm

    i would say in the video he needs ,first to clean out the joint from concrete dust a long the side and depending on depth apply a backer rod ,and would go back with a urethane caulk , in my opinion it sticks better to concrete than silicon.

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