I have volunteer plants gowing in the expansion cracks in my driveway. How & what do I use to fill the crack?

Answer 1

I used to work for a concrete flatwork company that poured driveways and sidewalks, so my experience is pretty reliable. Depending on how big the cracks are, you might be able to put a small strip of foam, called "Backer Rod", into the crack and then caulk over it with concrete caulk you can buy from Home Depot or Lowe's - or better yet, buy some concrete caulk from a local concrete tool supply store, as their caulk will almost always be better quality for how you're using it. For more info on Backer Rod go to www.bayindustries.com. If there isn't enough room for the strip of foam, just use the caulk by itself. Unfortunately you may have to caulk the same area yearly, depending on weather and expansion of soils. If it's a really tiny crack, you may be better off filling it with an epoxy - also available from a local concrete tool supply store - probably not available at Home Depot. UPDATE - In response to an answer posted after mine... the expansion joints are there for a reason, and that reason is to keep the concrete from cracking all over the place as it is initially curing. Now that your concrete is sufficiently cured, the expansion joints have done their job. Filling these cracks with caulk will not somehow "mess up" their functionality. So long as its nothing extremely major, your sections will still heave and settle on those weaker expansion joints.

Answer 2

You don't want to fill expansion cracks in your driveway. They are there for a reason. Get round-up to kill the weeds.

Answer 3

To kill the weeds all i do is pour hot salt water on the weeds, or use round up but to fix the cracks in the side walk they have stuff called vinyl concrete patch for side walks it comes in bags just like concrete, works great and last a very long time..and one bag goes pretty far...hope this helps...Lowe's,home depot most contractors store carries it..

Answer 4

Each spring I spray my expansion joints with roundup. No volunteers! But you can use the inferior other brand if you want to. Most expansion joint fillers are petroleum based and I avoid them.

Answer 5

I'd use caulking or maybe even sand.