Are the tiles waterproof? Do they come with a cancer warning?

Our 2.5" Jamboree Playground Tiles are not waterproof. They are porous on purpose as to allow water to flow through the tiles so that water does not pool on the surface of the tiles. These playground tiles were designed for outdoor use, so this is important when using these tiles in areas where kids will be playing whether rain or shine. This helps to ensure that the tiles won't create a slip hazard. These playground tiles are very safe and do not come with a cancer warning. All of our products are tested on a regular basis to ensure the safety of them for our customers.