Would it be "Wet Concrete"?

"Hydrating Concrete"

or an even better sign...
"If you want to step on the obviously fresh pavement, please feel free to do so. The cement that attaches itself to your shoes will suck the water and life out of them and you will have left us a nice print. We will use that print to track you down and pummel you for being so negligent as to ruin our perfect finish."

I was thinking "Wet Cement". It has a more classic feel, even if it isn't quite as precise.

But I sort of like kmsqrd's verbose version...

Two posts from Jim in one day! Hell has frozen over!

Now that you mention it, it is getting a bit chilly in here.

Victor, I was thinking the same thing. I had to check my pulse to make sure I hadn't died and gone to heaven.

Yeah, sometimes that summer spent studying cement (I kid you not) comes back to haunt me.

Is that roof high enough...or does it need to be raised.

DON'T TOUCH