Ben,
I got a product from Sherwin Williams, made for this purpose. It's called Stampede-1SL, and cost $15.00 a quart. It comes in the large caulking tubes.
I talked to Neil that built the new airplane hanger south of Rock Falls, and he found a product for $4.00 a tube. I haven't spoken to him since he got it done.
I filled the saw cuts with silica sand, and then brushed them out to 1/4" depth. I then ran a real thick bead of the caulking on the cuts, let it set up for a day, and trimmed it off level.
I'm thinking that I should have let it set a while longer because it's now settled a little below level, but not enough to retain dirt while sweeping.
I also learned that I didn't need such a thick bead. I used 6 tubes, and feel like I scraped off 4 of them.