This is one of those warnings that may sound silly, but really isn’t. I wouldn’t be surprised if a whole lot of people have tried to use kitty litter as a traction aid for icy walkways:
Do not use this product as a traction aid because product becomes slippery and slick when wet.
I ding the seller one point for being redundant because “slippery” and “slick” are the same thing, but not a bad warning.
I have a bigger problem with the instructional photos. Does people really need illustrations to show how to pour cat litter?