Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

After the brutal winter, my wife and I found several locations on our driveway where the concrete is crumbling. This is the worst of them:

driveway damage

In the past, I have used self-leveling concrete caulk similar to this to fix damage like this:


However, I am concerned that due to it being near the edge that the caulk will fill in the crack between blocks and possibly make the damage worse due to expanding and contracting of the concrete.

How should I repair this damage, short of replacing the driveway itself?

share|improve this question
up vote 1 down vote accepted

The technical term for what happened to the concrete on your driveway is that it "spalled", and sealing it with caulking isn't going to do much toward repairing it at this point. What you'll want to do is clean out all of the loose debris (a shop-vac and wire brush work pretty well) and then pressure wash it. After it is completely dry, inject or force epoxy down into any crack that extends down from the damaged area. Then apply a concrete bonding agent, fill it with a patching concrete and trowel it smooth.

Note - depending on the condition of the rest of the driveway, you might want to look into applying a concrete sealer to extend its life.

share|improve this answer
Thanks for the advice -- at some point this summer when it warms up consistently we will have to fix this. The damage will only get worse, and the snowblower already kicks up rocks from the driveway: this crumbling concrete will only increase the risk of breaking something (I already broke a car window with the line trimmer kicking up a rock). – Snowman Apr 16 '14 at 2:22
Would a home-made batch of concrete made out of a bucket not work just as well, with significat cost savings? To me it looks like that slab is on the thin side. how about cleaning the holes, washing and laying fresh cement/concrete into each hole, then Floating it flat. why all the technical products for something that is inherently flawed already? – Hightower Mar 23 '15 at 13:17
@Hightower - If the cracks aren't sealed, moisture and/or freeze-thaw cycles will just make the patch separate again. Patching concrete is formulated to allow a much thinner application than normal concrete, and the bonding agent helps it adhere better. While you could always just dump some new concrete into the holes, you would most likely have to keep repairing them again and again. – Comintern Mar 23 '15 at 22:27

This problem is termed as concrete spalling. You can fix it without replacing the entire driveway. Before you begin it’s important to power wash the surface. Use a stiff broom to brush the entire surface. Shop for a cleaner concentrate easily available at a hardware store. Next, inject your concrete into the injection hole. You must not go over 40 psi. If you do the crack may widen more. Make sure you adjust the pressure of your injecting device. It should be lower than forty psi.The epoxy will take at least 24 to 36 hours to set.

share|improve this answer
Hi and welcome to the site. I edited out the link in your post because it's not relevant to the worldwide audience of this site. Also, if you're affiliated with the service you linked to, you must disclose that affiliation. Please see the promotion, product support and behavior pages in the help center for more information. – Niall C. Mar 23 '15 at 14:39

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.