I would think the herculiner would be slick as snot when it's wet, I may be wrong. I have some concrete steps that I paint with concrete paint that they add fine grain sand into. Most paint stores sell it, I know Sherwin Williams does. I think it would be cheaper too. I've seen the epoxies down of floors of car dealerships/garages. I think it would probably be more appropriate as well. Google concrete floor paint or epoxy.
"Until one has loved an animal, part of one's soul remains unawakened..."
- Anatole France