Lets just say we are getting close…
I once read an article in the New York Times(do not believe what you read-question and deny everything you read and your life will not be simple anymore) about some company that invented “stain resistant” concrete. To most people stain resistant means it does not stain… That is actually not the good way to interpret it. Stain resistant means stain resistant. How resistant? There is no clear answer to that.
That article I read brought my confidence levels down a bit since I thought that my concrete was the best of the best at that time(approx 8 years ago) and I knew I was using the best possible additives and the best possible sealers but I would not label my concrete “stain resistant” knowing what people actually understand by that. It did resist stains but it was not “there” in my opinion and whoever I sold it to I would explain that it is a material that will “age” with time.
I ordered some samples of that “stainless concrete” and I soon found out that it was nothing but a coated concrete… What is wrong with that? Actually, nothing. We see coatings all around us but to me a coating and concrete are two things I do not like to mix together. Dont ask me why cause I am trying to limit the cuss words in my life-they are bad energy:)
To make the story short, I think The New York Times deserves another article that actually talks about a truly stain resistant concrete rather than stain resistant coating applied to concrete. Concrete Shop (my company) actually came up with a concrete mix that combined with a third party sealing technology(not a coating) makes concrete extremely stain resistant. I would like to share this breakthrough withwhoever reads this blog. (it is not the first time this has been achieved, but this is really a breakthrough for the Concrete Shop)
Here are some pictures of my tests. This concrete is tested for oil and vinegar resistance. I could not find cooking oil so compressor oil was used instead. Here are some pictures…
The sample is divided into two sides(left and right). We are concerned with the left part. The right part is for my own studies.
As you see we have 30 min,1hr,4hrs and 8hrs intervals. The 8hr interval is actually a 24 hrs interval since I had to leave my shop for the night before the time had passed.
The first pic shows the sample at the beginning of the test.
the second pic shows the sample after 30 min. you may notice slight darkening on the left(forget right side) that will later disappear.
The third pic shows the test result after 1 hr.
The 4th picture shows test results after 4hrs.
The 5th pic shows the test results after 24hrs of exposure. I should have taken a picture right before I wiped off the vinegar. It practically evaporated and left white residue that was later cleaned with soap and water. As you see the darkening from previous pictures has gone away and the sample is spotless.
one more from a different angle. You can notice some spot on the right side of the sample but as I said that is not our concern here. 
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