No it does not inhibit sweeping or rolling anything at all, even stuff with steel wheels are fine like hydraulic jacks, etc. Even grinding disc dust sweeps out almost perfectly clean. Calling it sand is a stretch to be honest, but that was the best general description I could think of. If it is sand it is the finest sand I've ever seen.
It was called "shark bite," and also a sherwinn williams product. It wasn't expensive at all to add that in considering I was spending $300 as it was.
After doing it, I kind of thought it would have been fine without it actually, probably because I took so much time and effort to acid etch the floor. I think the shark bite is really for people who are coating a floor that is left with the steel trowel smooth finish, but I was worried the coating would peel a few years down the road if I left it so smooth.