# Concrete on my car!

**URL:** <https://community.cartalk.com/t/concrete-on-my-car/5190>\
**Category:** Maintenance/Repairs\
**Created:** [September 27, 2007, 8:49pm UTC](https://community.cartalk.com/t/concrete-on-my-car/5190 "2007-09-27T20:49:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sustenance](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@sustenance](https://community.cartalk.com/u/sustenance)\
**Post date:** [September 27, 2007, 8:49pm UTC](https://community.cartalk.com/t/concrete-on-my-car/5190/1 "2007-09-27T20:49:23Z")

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I went on vacation only to return to a serious splattering of concrete on the passenger side of my car. It was thoroughly dry by the time of my return. I’ve scraped of much of the smaller spots with a worthless credit card but the bigger chunks won’t budge . . . suggestions please?!?!

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [September 27, 2007, 9:48pm UTC](https://community.cartalk.com/t/concrete-on-my-car/5190/2 "2007-09-27T21:48:23Z")

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I’d take it to a detailer. Doing it yourself is risky, and everytime you wet it the concrete becomes stronger and more tenacious.

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**Author:** ![TeacherX](https://avatars.discourse-cdn.com/v4/letter/t/94ad74/32.png) [@TeacherX](https://community.cartalk.com/u/TeacherX)\
**Post date:** [September 27, 2007, 10:04pm UTC](https://community.cartalk.com/t/concrete-on-my-car/5190/3 "2007-09-27T22:04:59Z")

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I believe Tom and Ray answered this question over the summer. IF it is just the residue from the concrete they suggested using a diluted muriacid, like the stuff you put in swimming pools. For the big pieces use a better scraper/spatula. Make sure it’s made out of plastic. Try the acid on a small area first.

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**Author:** ![barky2](https://avatars.discourse-cdn.com/v4/letter/b/45deac/32.png) [@barky2](https://community.cartalk.com/u/barky2)\
**Post date:** [September 28, 2007, 12:58am UTC](https://community.cartalk.com/t/concrete-on-my-car/5190/4 "2007-09-28T00:58:14Z")

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I remember that show. When they called the guy back on Stump-the-Chumps he said it worked like a charm and did not harm the finish at all, but as suggested above, try on a small test area first.

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [September 28, 2007, 4:19am UTC](https://community.cartalk.com/t/concrete-on-my-car/5190/5 "2007-09-28T04:19:56Z")

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This company: [http://www.safe-react.com/conrem.htm](http://www.safe-react.com/conrem.htm), claims that their product is better and safer at removing concrete, from various surfaces, than muriatic acid.