Cannot get these out. Used f9 de and after groundskeeper and they just got a little lighter. Scrubbed also. No hot water. 1 year old concrete.
I think you answered your own question…hot water.
Hot water seems to help it, based on my experience….
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Yea it’s odd that some threads here have people using cold water and the same exact chems I did and it works and for others it doesn’t.
Frustrating because I couldn’t charge full price because they definitely were not removed only lightened (driveway was very clean and wanted these removed specifically)
I did scrub brush it also and even tried a third degreaser and it didn’t budge any further.
What was your application ratios and methods? Try posting this on the F9 Facebook board.
The cookbook says to use DE straight on tire marks.
I didn’t see that about the de, I went 10 or 20:1 for it since the rest of it was clean. I didn’t see tire marks in the cookbook mentioned as needing full strength.
I go straight on tire marks myself, just did one couple weeks ago on year and half old concrete. Also used some heat and reduced pressure to 1200 Psi. Came out great……
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Ok so I was hesitant on the Chems when I should have tried 1:1. Just want to have my own proper expectations when using cold water also.
Have a plan of action from F 9 and will attempt again.
So I ended up applying straight double eagle to the marks while dry, scrub in, dwell 10-15 min depending on the sun then scrub and rinse.
It’s working but slow, like it’s wearing it down vs releasing it completing from the concrete. Some of these marks were thick so maybe that’s to be expected using cold water.
Then tried some grounds keeper but didn’t see as much progress.
Ran out of DE (store closed) so I tried some zep then simple green and they did nothing.
Looked a lot better and they were ok with it. Told them when I get more DE I’ll drive by when I can. Really don’t need my trailer since I’m not really not using pressure.
Looks to me like those aren’t just tire marks, somebody did a burnout. Twice. On the way out of the driveway. And they have an open differential. @Racer probably has some experience at cleaning them off but even more experience at installing them haha.
Owner claims he did it but I don’t think he burnt out. Said everything was fresh like the driveway and the road even. Neighbors have them too but def not as bad. Driveway was like a month old he said.
Those are definitely not burnout marks, you can clearly see the tread patterns.
Someone drove over fresh tar and pulled into the driveway.
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Good eye dude! I didn’t zoom in. At a glance it looked like one side spun before the other broke loose on one set.
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@PWinfo If it is asphalt / tar as @dcbrock suggested, try Prosoco Sure Kleen Asphalt and Tar remover. It is safe for masonry and concrete. It does a good job of melting the tar. It is also rinsible with water. However it is a tedious process. Pour some on the tire marks, scrub a small area with a stiff nylon brush and rinse. It’s good stuff but it is pricey.
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Almost seems like tar, when using the chems I can scratch at it and it’s like gooey but stuck there.
I have to scrub at it either way.
C-Tar Melt may also be an option to check into.
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Maybe a torch and scrapper to get off as much of surface layer and then try chems again. Roofer use a torch that hooks to a propane tank and has a hose and handle like a pump sprayer
Sorry to say this but I really feel this is a job for hot water.
Hot water is great. But look up a product called cleano. You could wipe up the tire mark with a paper towel
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