How to Get Dried Concrete Off a Car

Written by melody buller
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How to Get Dried Concrete Off a Car
Be sure cement mixing equipment will not be in use if you need to park in close proximity. (cement mixer image by Joann Cooper from

Concrete drying on a car can be a perplexing problem for a car owner. However, there are products which claim to safely remove dried concrete from a vehicle without damaging its paint or body. These products are fairly easy to employ, even for a person who is not a car care expert.

Skill level:

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Things you need

  • Speedy Clean Method:
  • 1 spray bottle Speedy Clean
  • Chamois or cloth
  • Water
  • Back-Set Method:
  • 1 spray bottle Back-Set
  • Brush (optional)
  • Water

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  1. 1

    Spray hardened concrete with the solvent until it is saturated. You will see the cement turn white, and then darken. If the cement stays white, spray again until thoroughly saturated.

    How to Get Dried Concrete Off a Car
    To keep a paint job intact, do not scrape or chip hardened cement. (car image by Edvin selimovic from
  2. 2

    Allow the solution to set for 10 to 15 minutes.

  3. 3

    Soak through again with Speedy-Clean, and the cement will begin to soften.

  4. 4

    After 20 to 30 minutes, wipe softened the cement off of the car with the chamois or cloth, and rinse the surface clean with water.

  1. 1

    Thoroughly soak dried concrete with Back-Set. You may spray the solvent, or if you prefer, brush it into the cement. Be sure to use a brush that will not scratch the vehicle.

    How to Get Dried Concrete Off a Car
    The solvent can be either sprayed or brushed onto the concrete. (spray image by dinostock from
  2. 2

    Allow Back-Set to set for about 15 to 20 minutes.

  3. 3

    Thoroughly soak the cement with the solvent a second time

  4. 4

    After about 20 to 30 minutes, rinse away the softened cement with water.

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