I agree with Justin's recommendation. I thought that RB will fill the saw cuts, but it didn't. I'm going to try to fill them now. The putty knife test is probably a good one.
The thinner version of RB for concrete that Justin and RB might start to ship from the factory might flow into the saw cuts better, but I wouldn't count on it.
It just didn't seem to flow into the cracks. I suppose if I would have take a quart of RB, thinned it, and then sat on the floor with a bush or 3" roller or some kind of thing to work the RB into the saw cracks it might have worked. I had worked really hard to clean the cracks out before applying the RB, I should have spent that time filling them.
I just got done putting RB on the wood floor of my new enclosed race trailer. The surface of the wood floor had some imperfections that I thought the RB would readily "flow" into, but it didn't there were a number of spots that I really had to work the RB into.